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Guillory WX, de Medeiros Magalhães F, Coelho FEA, Bonatelli IAS, Palma-Silva C, Moraes EM, Garda AA, Burbrink FT, Gehara M. Geoclimatic drivers of diversification in the largest arid and semi-arid environment of the Neotropics: Perspectives from phylogeography. Mol Ecol 2024:e17431. [PMID: 38877815 DOI: 10.1111/mec.17431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/24/2024] [Accepted: 05/30/2024] [Indexed: 06/16/2024]
Abstract
The South American Dry Diagonal, also called the Diagonal of Open Formations, is a large region of seasonally dry vegetation extending from northeastern Brazil to northern Argentina, comprising the Caatinga, Cerrado, and Chaco subregions. A growing body of phylogeography literature has determined that a complex history of climatic changes coupled with more ancient geological events has produced a diverse and endemic-rich Dry Diagonal biota. However, the exact drivers are still under investigation, and their relative strengths and effects are controversial. Pleistocene climatic fluctuations structured lineages via vegetation shifts, refugium formation, and corridors between the Amazon and Atlantic forests. In some taxa, older geological events, such as the reconfiguration of the São Francisco River, uplift of the Central Brazilian Plateau, or the Miocene inundation of the Chaco by marine incursions, were more important. Here, we review the Dry Diagonal phylogeography literature, discussing each hypothesized driver of diversification and assessing degree of support. Few studies statistically test these hypotheses, with most support drawn from associating encountered phylogeographic patterns such as population structure with the timing of ancient geoclimatic events. Across statistical studies, most hypotheses are well supported, with the exception of the Pleistocene Arc Hypothesis. However, taxonomic and regional biases persist, such as a proportional overabundance of herpetofauna studies, and the under-representation of Chaco studies. Overall, both Pleistocene climate change and Neogene geological events shaped the evolution of the Dry Diagonal biota, though the precise effects are regionally and taxonomically varied. We encourage further use of model-based analyses to test evolutionary scenarios, as well as interdisciplinary collaborations to progress the field beyond its current focus on the traditional set of geoclimatic hypotheses.
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Affiliation(s)
- Wilson X Guillory
- Department of Earth and Environmental Sciences, Rutgers University Newark, Newark, New Jersey, USA
- Department of Biological Sciences, Rutgers University Newark, Newark, New Jersey, USA
| | | | | | - Isabel A S Bonatelli
- Departamento de Ecologia e Biologia Evolutiva, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, São Paulo, Brazil
| | - Clarisse Palma-Silva
- Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, Brazil
| | - Evandro M Moraes
- Departamento de Biologia, Universidade Federal de São Carlos (UFSCar), Sorocaba, São Paulo, Brazil
| | - Adrian Antonio Garda
- Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Frank T Burbrink
- Department of Herpetology, The American Museum of Natural History, New York City, New York, USA
| | - Marcelo Gehara
- Department of Earth and Environmental Sciences, Rutgers University Newark, Newark, New Jersey, USA
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2
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Fonseca EM, Pope NS, Peterman WE, Werneck FP, Colli GR, Carstens BC. Genetic structure and landscape effects on gene flow in the Neotropical lizard Norops brasiliensis (Squamata: Dactyloidae). Heredity (Edinb) 2024; 132:284-295. [PMID: 38575800 PMCID: PMC11166928 DOI: 10.1038/s41437-024-00682-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/12/2024] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Abstract
One key research goal of evolutionary biology is to understand the origin and maintenance of genetic variation. In the Cerrado, the South American savanna located primarily in the Central Brazilian Plateau, many hypotheses have been proposed to explain how landscape features (e.g., geographic distance, river barriers, topographic compartmentalization, and historical climatic fluctuations) have promoted genetic structure by mediating gene flow. Here, we asked whether these landscape features have influenced the genetic structure and differentiation in the lizard species Norops brasiliensis (Squamata: Dactyloidae). To achieve our goal, we used a genetic clustering analysis and estimate an effective migration surface to assess genetic structure in the focal species. Optimized isolation-by-resistance models and a simulation-based approach combined with machine learning (convolutional neural network; CNN) were then used to infer current and historical effects on population genetic structure through 12 unique landscape models. We recovered five geographically distributed populations that are separated by regions of lower-than-expected gene flow. The results of the CNN showed that geographic distance is the sole predictor of genetic variation in N. brasiliensis, and that slope, rivers, and historical climate had no discernible influence on gene flow. Our novel CNN approach was accurate (89.5%) in differentiating each landscape model. CNN and other machine learning approaches are still largely unexplored in landscape genetics studies, representing promising avenues for future research with increasingly accessible genomic datasets.
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Affiliation(s)
- Emanuel M Fonseca
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, USA
| | - Nathaniel S Pope
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR, 97403, USA
| | - William E Peterman
- School of Environment and Natural Resources, The Ohio State University, Columbus, OH, USA
| | - Fernanda P Werneck
- Coordenação de Biodiversidade, Programa de Coleções Científicas Biológicas, Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, Brasília, Brazil
| | - Bryan C Carstens
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, USA.
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Almeida-Silva D, Servino LM, Pontes-Nogueira M, Sawaya RJ. Marine introgressions and Andean uplift have driven diversification in neotropical Monkey tree frogs (Anura, Phyllomedusinae). PeerJ 2024; 12:e17232. [PMID: 38646479 PMCID: PMC11027904 DOI: 10.7717/peerj.17232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 03/21/2024] [Indexed: 04/23/2024] Open
Abstract
The species richness in the Neotropics has been linked to environmental heterogeneity and a complex geological history. We evaluated which biogeographic processes were associated with the diversification of Monkey tree frogs, an endemic clade from the Neotropics. We tested two competing hypotheses: the diversification of Phyllomedusinae occurred either in a "south-north" or a "north-south" direction in the Neotropics. We also hypothesized that marine introgressions and Andean uplift had a crucial role in promoting their diversification. We used 13 molecular markers in a Bayesian analysis to infer phylogenetic relationships among 57 species of Phyllomedusinae and to estimate their divergence times. We estimated ancestral ranges based on 12 biogeographic units considering the landscape modifications of the Neotropical region. We found that the Phyllomedusinae hypothetical ancestor range was probably widespread throughout South America, from Western Amazon to Southern Atlantic Forest, at 29.5 Mya. The Phyllomedusines' ancestor must have initially diverged through vicariance, generally followed by jump-dispersals and sympatric speciation. Dispersal among areas occurred mostly from Western Amazonia towards Northern Andes and the South American diagonal of dry landscapes, a divergent pattern from both "south-north" and "north-south" diversification hypotheses. Our results revealed a complex diversification process of Monkey tree frogs, occurring simultaneously with the orogeny of Northern Andes and the South American marine introgressions in the last 30 million years.
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Affiliation(s)
- Diego Almeida-Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, São Paulo, Brazil
- Miguel Lillo, Unidad Ejecutora Lillo, San Miguel de Tucumán, Tucumán, Argentina
| | - Leonardo Matheus Servino
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, São Paulo, Brazil
- Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Matheus Pontes-Nogueira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, São Paulo, Brazil
| | - Ricardo J. Sawaya
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, São Paulo, Brazil
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Arantes ÍC, Vasconcellos MM, Smith ML, Garrick RC, Colli GR, Noonan BP. Species limits and diversification of the Dendropsophus rubicundulus subgroup (Anura, Hylidae) in Neotropical savannas. Mol Phylogenet Evol 2023:107843. [PMID: 37286064 DOI: 10.1016/j.ympev.2023.107843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/09/2023]
Abstract
Understanding the processes that generate and maintain biodiversity at and below the species level is a central goal of evolutionary biology. Here we explore the spatial and temporal drivers of diversification of the treefrog subgroup Dendropsophus rubicundulus, a subgroup of the D. microcephalus species group, over periods of pronounced geological and climatic changes in the Neotropical savannas that they inhabit. This subgroup currently comprises 11 recognized species distributed across the Brazilian and Bolivian savannas, but the taxonomy has been in a state of flux, necessitating reexamination. Using newly generated single nucleotide polymorphism (SNP) data from restriction-site associated DNA sequencing (RADseq) and mitochondrial 16S sequence data for ∼150 specimens, we inferred phylogenetic relationships, tested species limits using a model-based approach, and estimated divergence times to gain insights into the geographic and climatic events that affected the diversification of this subgroup. Our results recognized at least nine species: D. anataliasiasi, D. araguaya, D. cerradensis, D. elianeae, D. jimi, D. rubicundulus, D. tritaeniatus, D. rozenmani, and D. sanborni. Although we did not collect SNP data for the latter two species, they are likely distinct based on mitochondrial data. In addition, we found genetic structure within the widespread species D. rubicundulus, which comprises three allopatric lineages connected by gene flow upon secondary contact. We also found evidence of population structure and perhaps undescribed diversity in D. elianeae, which warrants further study. The D. rubicundulus subgroup is estimated to have originated in the Late Miocene (∼5.45 million years ago), with diversification continuing through the Pliocene and Early Pleistocene, followed by the most recent divergence of D. rubicundulus lineages in the Middle Pleistocene. The epeirogenic uplift followed by erosion and denudation of the central Brazilian plateau throughout the Pliocene and Pleistocene, in combination with the increasing frequency and amplitude of climatic fluctuations during the Pleistocene, was important for generating and structuring diversity at or below the species level in the D. rubicundulus subgroup.
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Affiliation(s)
- Ísis C Arantes
- Department of Biology, University of Mississippi, Oxford, MS 38677, USA.
| | - Mariana M Vasconcellos
- Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, 05508-090, Brazil
| | - Megan L Smith
- Department of Biology and Department of Computer Science, Indiana University, Bloomington, IN 47405, USA
| | - Ryan C Garrick
- Department of Biology, University of Mississippi, Oxford, MS 38677, USA
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, 70910-900 Brasília, Distrito Federal, Brazil
| | - Brice P Noonan
- Department of Biology, University of Mississippi, Oxford, MS 38677, USA
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Ishihara MA, Domingos FMCB, Gomides SC, Novelli IA, Colli GR, Vargas SM. Genetic structure of Enyalius capetinga (Squamata, Leiosauridae) in Central Cerrado and transitional areas between the Cerrado and the Atlantic forest, with updated geographic distribution. Genetica 2022; 150:367-377. [PMID: 36229707 DOI: 10.1007/s10709-022-00170-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 09/28/2022] [Indexed: 11/26/2022]
Abstract
The Brazilian Cerrado is considered a biodiversity hotspot highly threatened by human activities. Recently, many studies have demonstrated how underestimated is Cerrado's biodiversity considering squamate species, and the identification of divergent and cryptic lineages is essential for the formulation of effective conservation strategies. The transition areas between the Cerrado and the Atlantic Forest are even less known and, consequently, often dismissed in conservation policies. As previous studies suggested the presence of cryptic diversity within E. capetinga, we investigated patterns and processes in the geographic distribution of its genealogical lineages. We used DNA sequences from individuals collected in six localities and sequences publicly available from three mitochondrial markers (CYT-B, 16S and ND4) and one nuclear marker (C-Mos). We tested if the core and ecotone regions of the Cerrado show differences in biotic and abiotic characteristics that could promote genetic structure and divergence among lineages within E. capetinga. We found evidence for divergent lineages within the species, but not congruent with our hypothesis. Similar divergent patterns were observed in other Cerrado lizards, including interspecific divergences within the Enyalius genus. Molecular characterization of field-collected individuals (previously identified as E. bilineatus), allowed us to update the geographic distribution of the species to include the ecotone between the Cerrado and the Atlantic Forest, an area where species distribution overlap.
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Affiliation(s)
- M A Ishihara
- Departamento de Ciências Biológicas, Laboratório de Genética E Evolução Molecular, Universidade Federal Do Espírito Santo, Vitória, ES, 29075-910, Brazil.
- Universidade Federal Do Espírito Santo, Vitória, ES, 29075-910, Brazil.
| | - F M C B Domingos
- Departamento de Zoologia, Universidade Federal Do Paraná, Curitiba, PR, 81531-980, Brazil
| | - S C Gomides
- Programa de Pós-Graduação em Biodiversidade, Universidade Federal do Oeste do Pará, Campus Oriximiná, Rodovia PA-254, 257, Oriximiná, PA, 68270-000, Brazil
| | - I A Novelli
- Laboratório de Zoologia, Centro Universitário de Lavras - UNILAVRAS, Lavras, MG, 37203-593, Brazil
| | - G R Colli
- Departamento de Zoologia, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | - S M Vargas
- Departamento de Ciências Biológicas, Laboratório de Genética E Evolução Molecular, Universidade Federal Do Espírito Santo, Vitória, ES, 29075-910, Brazil
- Universidade Federal Do Espírito Santo, Vitória, ES, 29075-910, Brazil
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6
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Porto CR, Fazolato CP, Marques R, Batalha-Filho H, Napoli MF, Garda AA, de Carvalho MLS, de Campos Fernandes FM. Unravelling the cryptic diversity and evolution of the dwarf swamp frog Pseudopaludicola mystacalis (Anura, Leptodactylidae) in open habitats of South America. AMPHIBIA-REPTILIA 2022. [DOI: 10.1163/15685381-bja10099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Many studies on the diversity of the South American biota support the role of ecological and geological events as main drivers of species diversification. For many groups, geomorphological events are the key drivers of diversification, while the influence of Pleistocene climate oscillations is prominent for others. To precisely indicate which events were key for the development of the astonishing biodiversity in South America, studies on widely distributed species are paramount. One such species, the dwarf swamp frog Pseudopaludicola mystacalis (Leptodactylidae, Leiuperinae), is widely distributed in open habitats of South America and we herein investigate population differentiation and diversification in this species across its geographic range. We sequenced a 1374 bp mtDNA fragment from 64 specimens across 25 localities. We used population assignment and species delimitation methods to assess genetic structure and lineage limits across the species distribution. We estimated, for each lineage, intraspecific diversity, divergence times, and demographic histories. Our results recovered ten lineages with up to 5% of genetic divergence among them. Diversification occurred mainly during the Tertiary, suggesting that Miocene-Pliocene topographic events had a major influence on the diversification of P. mystacalis. Pleistocene climatic oscillations also played a role on evolutionary history of P. mystacalis, causing demographic changes in one lineage.
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Affiliation(s)
- Clara Ribeiro Porto
- Universidade Federal da Bahia, Programa de Pós-Graduação em Genética e Biodiversidade, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
| | - Cecil Pergentino Fazolato
- Universidade Federal da Bahia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
| | - Ricardo Marques
- Universidade do Estado de Mato Grosso, 78690-000, Nova Xavantina, Mato Grosso, Brazil
| | - Henrique Batalha-Filho
- Universidade Federal da Bahia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
| | - Marcelo Felgueiras Napoli
- Universidade Federal da Bahia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
| | - Adrian Antonio Garda
- Universidade Federal do Rio Grande do Norte, Centro de Biociências, Departamento de Botânica e Zoologia, Avenida Senador Salgado Filho, S/N, Lagoa Nova, 59078-900, Natal, RN, Brazil
| | - Maria Luiza Silveira de Carvalho
- Universidade Federal da Bahia, Programa de Pós-Graduação em Genética e Biodiversidade, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
- Universidade Federal da Bahia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
| | - Flora Maria de Campos Fernandes
- Universidade Federal da Bahia, Programa de Pós-Graduação em Genética e Biodiversidade, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
- Universidade Federal da Bahia, Programa de Pós-Graduação em Biodiversidade e Evolução, Instituto de Biologia, Rua Barão de Jeremoabo, s/n, 40170-115, Ondina, Salvador, Bahia, Brazil
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7
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Mittan CS, Zamudio KR, Thomé MTC, Camurugi F, Colli GR, Garda AA, Haddad CFB, Prado CPA. Temporal and spatial diversification along the Amazonia-Cerrado transition in Neotropical treefrogs of the Boana albopunctata species group. Mol Phylogenet Evol 2022; 175:107579. [PMID: 35835425 DOI: 10.1016/j.ympev.2022.107579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 06/23/2022] [Accepted: 07/01/2022] [Indexed: 10/17/2022]
Abstract
Despite extensive research on biodiversity in Neotropical forests, biodiversity in seasonally dry, open biomes in South America has been underestimated until recently. We leverage a widespread group, Boana albopunctata, to uncover cryptic lineages and investigate the timing of diversification in Neotropical anurans with a focus on dry diagonal biomes (Cerrado, Caatinga and Chaco) and the ecotone between Amazonia and the Cerrado. We inferred a multilocus phylogeny of the B. albopunctata species group that includes 15 of 18 described species, recovered two cryptic species, and reconstructed the timing of diversification among species distributed across multiple South American biomes. One new potential species (B. aff. steinbachi), sampled in the Amazonian state of Acre, clustered within the B. calcara-fasciata species complex and is close to B. steinbachi. A second putative new species (B. aff. multifasciata), sampled in the Amazonia-Cerrado ecotone, is closely related to B. multifasciata. Lastly, we place a recently identified Cerrado lineage (B. aff. albopuncata) into the B. albopunctata species group phylogeny for the first time. Our ancestral range reconstruction showed that species in the B. albopuctata group likely dispersed from Amazonia-Cerrado into the dry-diagonal and Atlantic Forest. Intraspecies demography showed, for both B. raniceps and B. albopunctata, signs of rapid expansion across the dry diagonal. Similarly, for one clade of B. multifasciata, our analyses support an invasion of the Cerrado from Amazonia, followed by a rapid expansion across the open diagonal biomes. Thus, our study recovers several recent divergences along the Amazonia-Cerrado ecotone in northern Brazil. Tectonic uplift and erosion in the late Miocene and climate oscillations in the Pleistocene corresponded with estimated divergence times in the dry diagonal and Amazonia-Cerrado ecotone. Our study highlights the importance of these threatened open formations in the generation of biodiversity in the Neotropics.
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Affiliation(s)
- Cinnamon S Mittan
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA.
| | - Kelly R Zamudio
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA
| | - M Tereza C Thomé
- Departamento de Biodiversidade e Centro de Aquicultura, Instituto de Biociências, São Paulo State University (Unesp), Rio Claro, São Paulo, Brazil
| | - Felipe Camurugi
- Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande, Brazil; Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal da Paraíba, João Pessoa, Paraíba, Brazil
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, Brasília, DF, Brazil
| | - Adrian A Garda
- Laboratório de Anfíbios e Répteis, Departamento de Botânica e Zoologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Célio F B Haddad
- Departamento de Biodiversidade e Centro de Aquicultura, Instituto de Biociências, São Paulo State University (Unesp), Rio Claro, São Paulo, Brazil
| | - Cynthia P A Prado
- Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil
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8
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Fegies AC, Carmignotto AP, Perez MF, Guilardi MD, Lessinger AC. Molecular Phylogeny of Cryptonanus (Didelphidae: Thylamyini): Evidence for a recent and complex diversification in South American open biomes. Mol Phylogenet Evol 2021; 162:107213. [PMID: 34029717 DOI: 10.1016/j.ympev.2021.107213] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 11/30/2022]
Abstract
Systematic revisions of South American marsupials have contributed to our knowledge about genus and species diversity in the last decades, including studies of the most recently described genus Cryptonanus (Didelphidae), currently comprising four recognized species. Herein we provide the first phylogeny for these mouse opossums based on comprehensive sampling, including representatives from all nominal taxa, encompassing most of the geographic distribution of the genus while also extending its known range. The taxonomic status of Cryptonanus species was explored by analyses of multiple mitochondrial and nuclear DNA markers to assess phylogenetic relationships and to provide divergence time estimates, species delimitations and biogeographical hypotheses. Cryptonanus monophyly remained highly supported despite the inclusion of abundant new data from more than a hundred specimens, comprising 10 independent evolutionary lineages. Species-complexes within valid nominal taxa reveal higher species richness in the genus. Based on divergence estimates from a dated phylogeny, we suggest that Cryptonanus diversified along the Quaternary, with speciation events occurring well into the Pleistocene. The best supported biogeographical hypothesis endorses speciation by vicariance and subset speciation across open formations in shaping the evolutionary history of this didelphid genus, strongly associated with dry tropical landscapes of South America.
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Affiliation(s)
- Ana Cláudia Fegies
- Departamento de Engenharia Ambiental, Universidade Estadual Paulista (UNESP), Campus Sorocaba, Av. Três de Março 511, Sorocaba, São Paulo CEP 18087-180, Brazil
| | - Ana Paula Carmignotto
- Departamento de Biologia, Universidade Federal de São Carlos (UFSCar), Campus Sorocaba, Rodovia João Leme dos Santos km 110, Sorocaba, São Paulo CEP 18052-780, Brazil.
| | - Manolo Fernandez Perez
- Departamento de Genética e Evolução, Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís km 235, São Carlos, São Paulo CEP 13565-905, Brazil
| | - Mariana Dias Guilardi
- Laboratório de Ecologia e Evolução, Instituto Butantan, Avenida Vital Brazil 1500, São Paulo, São Paulo CEP 05503-000, Brazil
| | - Ana Cláudia Lessinger
- Departamento de Biologia, Universidade Federal de São Carlos (UFSCar), Campus Sorocaba, Rodovia João Leme dos Santos km 110, Sorocaba, São Paulo CEP 18052-780, Brazil.
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9
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Fonseca EM, Colli GR, Werneck FP, Carstens BC. Phylogeographic model selection using convolutional neural networks. Mol Ecol Resour 2021; 21:2661-2675. [PMID: 33973350 DOI: 10.1111/1755-0998.13427] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 04/02/2021] [Accepted: 04/28/2021] [Indexed: 11/26/2022]
Abstract
The discipline of phylogeography has evolved rapidly in terms of the analytical toolkit used to analyse large genomic data sets. Despite substantial advances, analytical tools that could potentially address the challenges posed by increased model complexity have not been fully explored. For example, deep learning techniques are underutilized for phylogeographic model selection. In non-model organisms, the lack of information about their ecology and evolution can lead to uncertainty about which demographic models are appropriate. Here, we assess the utility of convolutional neural networks (CNNs) for assessing demographic models in South American lizards in the genus Norops. Three demographic scenarios (constant, expansion, and bottleneck) were considered for each of four inferred population-level lineages, and we found that the overall model accuracy was higher than 98% for all lineages. We then evaluated a set of 26 models that accounted for evolutionary relationships, gene flow, and changes in effective population size among the four lineages, identifying a single model with an estimated overall accuracy of 87% when using CNNs. The inferred demography of the lizard system suggests that gene flow between non-sister populations and changes in effective population sizes through time, probably in response to Pleistocene climatic oscillations, have shaped genetic diversity in this system. Approximate Bayesian computation (ABC) was applied to provide a comparison to the performance of CNNs. ABC was unable to identify a single model among the larger set of 26 models in the subsequent analysis. Our results demonstrate that CNNs can be easily and usefully incorporated into the phylogeographer's toolkit.
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Affiliation(s)
- Emanuel M Fonseca
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, USA
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, Brasília, Brazil
| | - Fernanda P Werneck
- Coordenação de Biodiversidade, Programa de Coleções Científicas Biológicas, Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil
| | - Bryan C Carstens
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, USA
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10
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Souza LAD, Souza B, Pareja M, Frieiro-Costa FA, Silva MS. Structure and composition of the insect community associated with flower buds and inflorescences of Byrsonima verbascifolia (Malpighiaceae). J NAT HIST 2021. [DOI: 10.1080/00222933.2021.1881639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Livia A. de Souza
- Programa de pós-graduação em Entomologia, Universidade Federal de Lavras (UFLA), Lavras, Brasil
| | - Brígida Souza
- Programa de pós-graduação em Entomologia, Universidade Federal de Lavras (UFLA), Lavras, Brasil
| | - Martin Pareja
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, Brasil
| | | | - Marconi Souza Silva
- Departamento de Ecologia e Conservação, Universidade Federal de Lavras, Lavras, Brasil
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11
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Nali RC, Becker CG, Zamudio KR, Prado CPA. Topography, more than land cover, explains genetic diversity in a Neotropical savanna tree frog. DIVERS DISTRIB 2020. [DOI: 10.1111/ddi.13154] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Renato C. Nali
- Programa de Pós‐Graduação em Ciências Biológicas (Zoologia) Instituto de Biociências Universidade Estadual Paulista Rio Claro São Paulo Brazil
- Department of Ecology and Evolutionary Biology Cornell University Ithaca NY USA
| | | | - Kelly R. Zamudio
- Department of Ecology and Evolutionary Biology Cornell University Ithaca NY USA
| | - Cynthia P. A. Prado
- Programa de Pós‐Graduação em Ciências Biológicas (Zoologia) Instituto de Biociências Universidade Estadual Paulista Rio Claro São Paulo Brazil
- Departamento de Morfologia e Fisiologia Animal Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista Jaboticabal São Paulo Brazil
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12
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Ledo RMD, Domingos FMCB, Giugliano LG, Sites JW, Werneck FP, Colli GR. Pleistocene expansion and connectivity of mesic forests inside the South American Dry Diagonal supported by the phylogeography of a small lizard*. Evolution 2020; 74:1988-2004. [DOI: 10.1111/evo.13978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Roger Maia D. Ledo
- Área de Meio Ambiente Instituto Federal de Educação, Ciência e Tecnologia de Brasília Campus Samambaia Samambaia DF 70860 Brazil
- Departamento de Zoologia Universidade de Brasília Brasília DF 70910 Brazil
| | | | - Lilian G. Giugliano
- Departamento de Genética e Morfologia Universidade de Brasília Brasília DF 70910‐900 Brazil
| | - Jack W. Sites
- Department of Biology and Bean Life Sciences Museum Brigham Young University Provo Utah 84602 USA
| | - Fernanda P. Werneck
- Programa de Coleções Científicas Biológicas, Coordenação de Biodiversidade Instituto Nacional de Pesquisas da Amazônia Manaus AM 69060 Brazil
| | - Guarino R. Colli
- Departamento de Zoologia Universidade de Brasília Brasília DF 70910 Brazil
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13
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Changing Only Slowly: The Role of Phylogenetic Niche Conservatism in Caviidae (Rodentia) Speciation. J MAMM EVOL 2020. [DOI: 10.1007/s10914-020-09501-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Sheu Y, Zurano JP, Ribeiro‐Junior MA, Ávila‐Pires TC, Rodrigues MT, Colli GR, Werneck FP. The combined role of dispersal and niche evolution in the diversification of Neotropical lizards. Ecol Evol 2020; 10:2608-2625. [PMID: 32185006 PMCID: PMC7069304 DOI: 10.1002/ece3.6091] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 01/23/2023] Open
Abstract
Ecological requirements and environmental conditions can influence diversification across temporal and spatial scales. Understanding the role of ecological niche evolution under phylogenetic contexts provides insights on speciation mechanisms and possible responses to future climatic change. Large-scale phyloclimatic studies on the megadiverse Neotropics, where biomes with contrasting vegetation types occur in narrow contact, are rare. We integrate ecological and biogeographic data with phylogenetic comparative methods, to investigate the relative roles of biogeographic events and niche divergence and conservatism on the diversification of the lizard genus Kentropyx Spix, 1825 (Squamata: Teiidae), distributed in South American rainforests and savannas. Using five molecular markers, we estimated a dated species tree, which recovered three clades coincident with previously proposed species groups diverging during the mid-Miocene. Biogeography reconstruction indicates a role of successive dispersal events from an ancestral range in the Brazilian Shield and western Amazonia. Ancestral reconstruction of climatic tolerances and niche overlap metrics indicates a trend of conservatism during the diversification of groups from the Amazon Basin and Guiana Shield, and a strong signal of niche divergence in the Brazilian Shield savannas. Our results suggest that climatic-driven divergence at dynamic forest-savanna borders might have resulted in adaptation to new environmental niches, promoting habitat shifts and shaping speciation patterns of Neotropical lizards. Dispersal and ecological divergence could have a more important role in Neotropical diversification than previously thought.
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Affiliation(s)
- Yumi Sheu
- Programa de Pós‐Graduação em GenéticaConservação e Biologia EvolutivaInstituto Nacional de Pesquisas do AmazôniaManausBrasil
- Programa de Pós‐Graduação em Genética e MelhoramentoUniversidade Federal do Espírito SantoEspírito SantoBrasil
| | - Juan P. Zurano
- Departamento de Sistemática e EcologiaUniversidade Federal da ParaíbaJoão PessoaBrasil
| | | | | | - Miguel T. Rodrigues
- Departamento de ZoologiaInstituto de BiociênciasUniversidade de São PauloSão PauloBrasil
| | - Guarino R. Colli
- Departamento de ZoologiaInstituto de Ciências BiológicasUniversidade de BrasíliaBrasíliaBrasil
| | - Fernanda P. Werneck
- Programa de Coleções Científicas BiológicasCoordenação de BiodiversidadeInstituto Nacional de Pesquisas da AmazôniaManausBrasil
- Department of Organismic and Evolutionary BiologyMuseum of Comparative BiologyHarvard UniversityCambridgeMAUSA
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15
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Rivera D, Prates I, Rodrigues MT, Carnaval AC. Effects of climate and geography on spatial patterns of genetic structure in tropical skinks. Mol Phylogenet Evol 2020; 143:106661. [DOI: 10.1016/j.ympev.2019.106661] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/18/2019] [Indexed: 11/16/2022]
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16
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Hamdan B, Guedes TB, Carrasco PA, Melville J. A complex biogeographic history of diversification in Neotropical lancehead pitvipers (Serpentes, Viperidae). ZOOL SCR 2019. [DOI: 10.1111/zsc.12398] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Breno Hamdan
- Departamento de Genética Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil
- Laboratório de Coleções Biológicas e Biodiversidade Instituto Vital Brazil Niterói Brazil
| | - Thaís B. Guedes
- Programa de Pós‐Graduação em Biodiversidade, Ambiente e Saúde Centro de Estudos Superiores de Caxias Universidade Estadual do Maranhão Caxias Brazil
- Department of Biological and Environmental Sciences and Gothenburg Global Biodiversity Center University of Gothenburg Göteborg Sweden
| | - Paola A. Carrasco
- Facultad de Ciencias Exactas Físicas y Naturales Centro de Zoología Aplicada Universidad Nacional de Córdoba Córdoba Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Instituto de Diversidad y Ecología Animal (IDEA) Córdoba Argentina
| | - Jane Melville
- Sciences Department Museum Victoria Melbourne Vic. Australia
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17
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Perez R, Borges-Martins M. Integrative taxonomy of small worm lizards from Southern South America, with description of three new species (Amphisbaenia: Amphisbaenidae). ZOOL ANZ 2019. [DOI: 10.1016/j.jcz.2019.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Leal BSS, Graciano VA, Chaves CJN, Huacre LAP, Heuertz M, Palma-Silva C. Dispersal and local persistence shape the genetic structure of a widespread Neotropical plant species with a patchy distribution. ANNALS OF BOTANY 2019; 124:499-512. [PMID: 31219156 PMCID: PMC6798837 DOI: 10.1093/aob/mcz105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 06/18/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND AIMS Isolated populations constitute an ideal laboratory to study the consequences of intraspecific divergence, because intrinsic incompatibilities are more likely to accumulate under reduced gene flow. Here, we use a widespread bromeliad with a patchy distribution, Pitcairnia lanuginosa, as a model to infer processes driving Neotropical diversification and, thus, to improve our understanding of the origin and evolutionary dynamics of biodiversity in this highly speciose region. METHODS We assessed the timing of lineage divergence, genetic structural patterns and historical demography of P. lanuginosa, based on microsatellites, and plastid and nuclear sequence data sets using coalescent analyses and an Approximate Bayesian Computation framework. Additionally, we used species distribution models (SDMs) to independently estimate potential changes in habitat suitability. KEY RESULTS Despite morphological uniformity, plastid and nuclear DNA data revealed two distinct P. lanuginosa lineages that probably diverged through dispersal from the Cerrado to the Central Andean Yungas, following the final uplift of the Andes, and passed through long-term isolation with no evidence of migration. Microsatellite data indicate low genetic diversity and high levels of inbreeding within populations, and restricted gene flow among populations, which are likely to be a consequence of bottlenecks (or founder events), and high selfing rates promoting population persistence in isolation. SDMs showed a slight expansion of the suitable range for P. lanuginosa lineages during the Last Glacial Maximum, although molecular data revealed a signature of older divergence. Pleistocene climatic oscillations thus seem to have played only a minor role in the diversification of P. lanuginosa, which probably persisted through adverse conditions in riparian forests. CONCLUSIONS Our results imply drift as a major force shaping the evolution of P. lanuginosa, and suggest that dispersal events have a prominent role in connecting Neotropical open and forest biomes.
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Affiliation(s)
- Bárbara Simões Santos Leal
- Departamento de Ecologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
| | - Vanessa Araujo Graciano
- Departamento de Ecologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
| | - Cleber Juliano Neves Chaves
- Departamento de Ecologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
| | - Luis Alberto Pillaca Huacre
- Departamento de Ecología, Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Lima, Peru
| | | | - Clarisse Palma-Silva
- Departamento de Ecologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
- Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
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19
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Wollenberg Valero KC, Marshall JC, Bastiaans E, Caccone A, Camargo A, Morando M, Niemiller ML, Pabijan M, Russello MA, Sinervo B, Werneck FP, Sites JW, Wiens JJ, Steinfartz S. Patterns, Mechanisms and Genetics of Speciation in Reptiles and Amphibians. Genes (Basel) 2019; 10:genes10090646. [PMID: 31455040 PMCID: PMC6769790 DOI: 10.3390/genes10090646] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/21/2019] [Accepted: 08/05/2019] [Indexed: 12/22/2022] Open
Abstract
In this contribution, the aspects of reptile and amphibian speciation that emerged from research performed over the past decade are reviewed. First, this study assesses how patterns and processes of speciation depend on knowing the taxonomy of the group in question, and discuss how integrative taxonomy has contributed to speciation research in these groups. This study then reviews the research on different aspects of speciation in reptiles and amphibians, including biogeography and climatic niches, ecological speciation, the relationship between speciation rates and phenotypic traits, and genetics and genomics. Further, several case studies of speciation in reptiles and amphibians that exemplify many of these themes are discussed. These include studies of integrative taxonomy and biogeography in South American lizards, ecological speciation in European salamanders, speciation and phenotypic evolution in frogs and lizards. The final case study combines genomics and biogeography in tortoises. The field of amphibian and reptile speciation research has steadily moved forward from the assessment of geographic and ecological aspects, to incorporating other dimensions of speciation, such as genetic mechanisms and evolutionary forces. A higher degree of integration among all these dimensions emerges as a goal for future research.
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Affiliation(s)
| | - Jonathon C Marshall
- Department of Zoology, Weber State University, 1415 Edvalson Street, Dept. 2505, Ogden, UT 84401, USA
| | - Elizabeth Bastiaans
- Department of Biology, State University of New York, College at Oneonta, Oneonta, NY 13820, USA
| | - Adalgisa Caccone
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, USA
| | - Arley Camargo
- Centro Universitario de Rivera, Universidad de la República, Ituzaingó 667, Rivera 40000, Uruguay
| | - Mariana Morando
- Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC, CENPAT-CONICET) Bv. Brown 2915, Puerto Madryn U9120ACD, Argentina
| | - Matthew L Niemiller
- Department of Biological Sciences, The University of Alabama in Huntsville, Huntsville, AL 35899, USA
| | - Maciej Pabijan
- Department of Comparative Anatomy, Institute of Zoology and Biomedical Research, Jagiellonian University, ul. Gronostajowa 9, 30-387 Kraków, Poland
| | - Michael A Russello
- Department of Biology, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, BC V1V 1V7, Canada
| | - Barry Sinervo
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, Coastal Biology Building, 130 McAllister Way, Santa Cruz, CA 95060, USA
| | - Fernanda P Werneck
- Programa de Coleções Científicas Biológicas, Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Manaus 69060-000, Brazil
| | - Jack W Sites
- Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Hull HU6 7RX, UK
| | - John J Wiens
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA
| | - Sebastian Steinfartz
- Molecular Evolution and Systematics of Animals, Institute of Biology, University of Leipzig, Talstrasse 33, 04103 Leipzig, Germany
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20
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Abstract
: Anoles are regarded as important models for understanding dynamic processes in ecology and evolution. Most work on this group has focused on species in the Caribbean Sea, and recently in mainland South and Central America. However, the Eastern Tropical Pacific (ETP) is home to seven species of anoles from three unique islands (Islas Cocos, Gorgona, and Malpelo) that have been largely overlooked. Four of these species are endemic to single islands (Norops townsendi on Isla Cocos, Dactyloa agassizi on Isla Malpelo, D. gorgonae and N. medemi on Isla Gorgona). Herein, we present a phylogenetic analysis of anoles from these islands in light of the greater anole phylogeny to estimate the timing of divergence from mainland lineages for each species. We find that two species of solitary anoles (D. agassizi and N. townsendi) diverged from mainland ancestors prior to the emergence of their respective islands. We also present population-wide morphological data suggesting that both display sexual size dimorphism, similar to single-island endemics in the Caribbean. All lineages on Isla Gorgona likely arose during past connections with South America, and ecologically partition their habitat. Finally, we highlight the importance of conservation of these species and island fauna in general.
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21
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Vasconcellos MM, Colli GR, Weber JN, Ortiz EM, Rodrigues MT, Cannatella DC. Isolation by instability: Historical climate change shapes population structure and genomic divergence of treefrogs in the Neotropical Cerrado savanna. Mol Ecol 2019; 28:1748-1764. [DOI: 10.1111/mec.15045] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 01/17/2019] [Accepted: 01/23/2019] [Indexed: 12/30/2022]
Affiliation(s)
| | - Guarino R. Colli
- Departamento de Zoologia Universidade de Brasília Brasília Brazil
| | - Jesse N. Weber
- Department of Biological Sciences University of Alaska Anchorage Anchorage, Alaska
| | - Edgardo M. Ortiz
- Department of Integrative Biology The University of Texas at Austin Austin Texas
- Plant Biodiversity Research Department of Ecology and Ecosystem Management Technical University of Munich Freising Germany
| | - Miguel T. Rodrigues
- Departamento de Zoologia, Instituto de Biociências Universidade de São Paulo São Paulo Brazil
| | - David C. Cannatella
- Department of Integrative Biology The University of Texas at Austin Austin Texas
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22
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Diversification of the widespread neotropical frog Physalaemus cuvieri in response to Neogene-Quaternary geological events and climate dynamics. Mol Phylogenet Evol 2018; 132:67-80. [PMID: 30508632 DOI: 10.1016/j.ympev.2018.11.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 11/06/2018] [Accepted: 11/10/2018] [Indexed: 11/24/2022]
Abstract
Here we reconstructed the demographical history and the dispersal dynamics of Physalemus cuvieri through the Neogene-Quaternary periods by coupling DNA regions with different mutation rates, ecological niche modelling, reconstruction of spatio-temporal lineage dispersal and coalescent simulations. Still, to test alternative diversification scenarios we used approximate Bayesian computation. Molecular phylogenetic analysis recovered four deep and strongly supported clades, which we interpret as population lineages. The ancestral location reconstruction placed the root in southcentral Amazonia, and the dispersal events indicate that spatial displacement was widespread early in the diversification of this species. The demographical scenario of "Multiple Refugia" with recent lineage admixture was the most likely hypothesis to predict the observed genetic parameters of P. cuvieri. Our results revealed that Neogene orogenic events might have played a prominent role in the early diversification of P. cuvieri. The species shows deep divergences with strong regional population structure, despite its widespread distribution. Final uplift of the central Brazilian Plateau and formation of the river basins in Central South America played an important role in the origin, diversification and the maintenance of P. cuvieri lineages.
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23
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Yánez-Muñoz MH, Reyes-Puig C, Reyes-Puig JP, Velasco JA, Ayala-Varela F, Torres-Carvajal O. A new cryptic species of Anolis lizard from northwestern South America (Iguanidae, Dactyloinae). Zookeys 2018:135-163. [PMID: 30416343 PMCID: PMC6224367 DOI: 10.3897/zookeys.794.26936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 09/11/2018] [Indexed: 11/12/2022] Open
Abstract
A new species of Anolis lizard from the Andean slopes of southwestern Colombia and northwestern Ecuador, from between 1187 and 2353 m in elevation, is described. The new species can be distinguished from other Anolis in squamation, cranial osteology, hemipenial morphology, and nuclear and mitochondrial DNA. The new species is sister to Anolisaequatorialis, and it is suggested that previous records of A.aequatorialis in Colombia correspond to the new species described herein.
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Affiliation(s)
- Mario H Yánez-Muñoz
- Unidad de Investigación, Instituto Nacional de Biodiversidad. Rumipamba 341 y Av. de los Shyris. Casilla postal: 17-07-8976. Quito, Ecuador Instituto Nacional de Biodiversidad Quito Ecuador
| | - Carolina Reyes-Puig
- Unidad de Investigación, Instituto Nacional de Biodiversidad. Rumipamba 341 y Av. de los Shyris. Casilla postal: 17-07-8976. Quito, Ecuador Instituto Nacional de Biodiversidad Quito Ecuador.,Instituto de Zoología Terrestre, Museo de Zoología, Instituto BIOSFERA, Colegio de Ciencias Biológicas y Ambientales COCIBA, Universidad San Francisco de Quito USFQ, Diego de Robles y Vía Interoceánica, 170901, Quito, Ecuador Universidad San Francisco de Quito Quito Ecuador
| | - Juan Pablo Reyes-Puig
- Unidad de Investigación, Instituto Nacional de Biodiversidad. Rumipamba 341 y Av. de los Shyris. Casilla postal: 17-07-8976. Quito, Ecuador Instituto Nacional de Biodiversidad Quito Ecuador.,Fundación Red de Protección de Bosques ECOMINGA, Fundación Oscar Efrén Reyes, Departamento de Ambiente, Calle 12 de Noviembre N° 270 y Calle A. Martínez, Baños, Ecuador Fundación Red de Protección de Bosques ECOMINGA Baños Ecuador
| | - Julián A Velasco
- Museo de Zoología "Alfonso L. Herrera", Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico city, Mexico Universidad Nacional Autónoma de México Mexico Mexico
| | - Fernando Ayala-Varela
- Museo de Zoología, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre 1076 y Roca, Quito, Ecuador Pontificia Universidad Católica del Ecuador Quito Ecuador
| | - Omar Torres-Carvajal
- Museo de Zoología, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre 1076 y Roca, Quito, Ecuador Pontificia Universidad Católica del Ecuador Quito Ecuador
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24
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Lanna FM, Werneck FP, Gehara M, Fonseca EM, Colli GR, Sites JW, Rodrigues MT, Garda AA. The evolutionary history of Lygodactylus lizards in the South American open diagonal. Mol Phylogenet Evol 2018; 127:638-645. [PMID: 29906606 DOI: 10.1016/j.ympev.2018.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/05/2018] [Accepted: 06/06/2018] [Indexed: 11/16/2022]
Abstract
The Pleistocenic Arc Hypothesis (PAH) posits that South American Seasonally Dry Tropical Forests (SDTF) were interconnected during Pleistocene glacial periods, enabling the expansion of species ranges that were subsequently fragmented in interglacial periods, promoting speciation. The lizard genus Lygodactylus occurs in Africa, Madagascar, and South America. Compared to the high diversity of African Lygodactylus, only two species are known to occur in South America, L. klugei and L. wetzeli, distributed in SDTFs and the Chaco, respectively. We use a phylogenetic approach based on mitochondrial (ND2) and nuclear (RAG-1) markers covering the known range of South American Lygodactylus to investigate (i) if they are monophyletic relative to their African congeners, (ii) if their divergence is congruent with the fragmentation of the PAH, and (iii) if cryptic diversity exists within currently recognized species. Maximum likelihood and Bayesian phylogenetic analyses recovered a well-supported monophyletic South American Lygodactylus, presumably resulting from a single trans-Atlantic dispersal event 29 Mya. Species delimitation analyses supported the existence of five putative species, three of them undescribed. Divergence times among L. klugei and the three putative undescribed species, all endemic to the SDTFs, are not congruent with the fragmentation of the PAH. However, fragmentation of the once broader and continuous SDTFs likely influenced the divergence of L. wetzeli in the Chaco and Lygodactylus sp. 3 (in a SDTF enclave in the Cerrado).
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Affiliation(s)
- Flávia M Lanna
- Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59078-900 Natal, RN, Brazil.
| | - Fernanda P Werneck
- Coordenação de Biodiversidade, Programa de Coleções Científicas Biológicas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69067-375 Manaus, Amazonas, Brazil
| | - Marcelo Gehara
- American Museum of Natural History, Department of Herpetology, 79th St. Central Park West, New York, NY 10024, United States
| | - Emanuel M Fonseca
- Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59078-900 Natal, RN, Brazil
| | - Guarino R Colli
- Departamento de Zoologia, Universidade de Brasília, 70910-900 Brasília, DF, Brazil
| | - Jack W Sites
- Department of Biology and Bean Life Science Museum, Brigham Young University, Provo, UT 84602, United States
| | - Miguel T Rodrigues
- Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, 05508-090 São Paulo, SP, Brazil
| | - Adrian A Garda
- Departamento de Botânica e Zoologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59078-900 Natal, RN, Brazil
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25
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Freudenstein JV, Broe MB, Folk RA, Sinn BT. Biodiversity and the Species Concept-Lineages are not Enough. Syst Biol 2018; 66:644-656. [PMID: 27798406 DOI: 10.1093/sysbio/syw098] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 10/14/2016] [Indexed: 11/13/2022] Open
Abstract
The nature and definition of species continue to be matters of debate. Current views of species often focus on their nature as lineages-maximal reproductive communities through time. Whereas many authors point to the Evolutionary Species Concept as optimal, in its original form it stressed the ecological role of species as well as their history as lineages, but most recent authors have ignored the role aspect of the concept, making it difficult to apply unambiguously in a time-extended way. This trend has been exacerbated by the application of methods and concepts emphasizing the notion of monophyly, originally applied only at higher levels, to the level of individuals, as well as by the current emphasis on molecular data. Hence, some current authors recognize units that are no more than probable exclusive lineages as species. We argue that biodiversity is inherently a phenotypic concept and that role, as manifested in the organismal extended phenotype, is a necessary component of the species concept. Viewing species as historically connected populations with unique role brings together the temporal and phenotypic natures of species, providing a clear way to view species both in a time-limited and time-extended way. Doing so alleviates perceived issues with "paraphyletic species" and returns the focus of species to units that are most relevant for biodiversity.
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Affiliation(s)
- John V Freudenstein
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, USA
| | - Michael B Broe
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, USA
| | - Ryan A Folk
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, USA.,Florida Museum of Natural History, University of Florida, 1659 Museum Road, Gainesville, FL 32611, USA
| | - Brandon T Sinn
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, USA.,New York Botanical Garden, 2900 Southern Blvd., Bronx, NY 10458, USA
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Costa WJ. Three new species of the killifish genus Melanorivulus from the Rio Paraná Basin, central Brazilian Cerrado (Cyprinodontiformes, Aplocheilidae). ZOOSYST EVOL 2018. [DOI: 10.3897/zse.94.21321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Oda FH, Ávila RW, Drummond LDO, Santos DL, Gambale PG, Guerra V, Vieira RRS, Vasconcelos TS, Bastos RP, Nomura F. Reptile surveys reveal high species richness in areas recovering from mining activity in the Brazilian Cerrado. Biologia (Bratisl) 2017. [DOI: 10.1515/biolog-2017-0138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hofmann EP, Townsend JH. Origins and biogeography of the Anolis crassulus subgroup (Squamata: Dactyloidae) in the highlands of Nuclear Central America. BMC Evol Biol 2017; 17:267. [PMID: 29268694 PMCID: PMC5740896 DOI: 10.1186/s12862-017-1115-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 12/14/2017] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Recent studies have begun to reveal the complex evolutionary and biogeographic histories of mainland anoles in Central America, but the origins and relationships of many taxa remain poorly understood. One such group is the Anolis (Norops) crassulus species subgroup, which contains ten morphologically similar highland taxa, the majority of which have restricted distributions. The nominal taxon A. crassulus has a disjunct distribution from Chiapas, Mexico, through Guatemala, in the highlands of El Salvador, and in the Chortís Highlands of Honduras. We test the relationships of these species using multiple mitochondrial and nuclear loci in concatenated and multispecies coalescent frameworks, in an effort to both resolve long-standing taxonomic confusion and present new insights into the evolution and biogeography of these taxa. RESULTS Sequences of multiple mitochondrial and nuclear loci were generated for eight of the ten species of the Anolis crassulus species subgroup. We analyzed phylogenetic relationships and estimated divergence times and ancestral ranges of the subgroup, recovering a monophyletic subgroup within Anolis. Within the nominal taxon Anolis crassulus, we recovered multiple genetically distinct lineages corresponding to allopatric populations, and show that the Chortís Highland lineage split from the others over 13 MYA. Additionally, distinct mitochondrial lineages are present within the taxa A. heteropholidotus and A. morazani, and importantly, samples of A. crassulus and A. sminthus previously used in major anole phylogenetic analyses are not recovered as conspecific with those taxa. We infer a Chortís Highland origin for the ancestor of this subgroup, and estimate cladogenesis of this subgroup began approximately 22 MYA. CONCLUSIONS Our results provide new insights into the evolution, biogeography, and timing of diversification of the Anolis crassulus species subgroup. The disjunctly distributed Anolis crassulus sensu lato represents several morphologically conserved, molecularly distinct anoles, and several other species in the subgroup contain multiple isolated lineages.
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Affiliation(s)
- Erich P. Hofmann
- Department of Biology, Indiana University of Pennsylvania, Indiana, PA 15705-1081 USA
- Present Address: Department of Biological Sciences, Clemson University, Clemson, SC 29634 USA
| | - Josiah H. Townsend
- Department of Biology, Indiana University of Pennsylvania, Indiana, PA 15705-1081 USA
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Costa WJEM, Amorim PF, Mattos JLO. Molecular phylogeny and timing of diversification in South American Cynolebiini seasonal killifishes. Mol Phylogenet Evol 2017; 116:61-68. [PMID: 28754241 DOI: 10.1016/j.ympev.2017.07.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 07/10/2017] [Accepted: 07/24/2017] [Indexed: 11/17/2022]
Abstract
The rich biological diversity of South America has motivated a series of studies associating evolution of endemic taxa with the dramatic geologic and climatic changes that occurred during the Cainozoic. The organism here studied is the killifish tribe Cynolebiini, a group of seasonal fishes uniquely inhabiting temporary pools formed during the rainy seasons. The Cynolebiini are found in open vegetation areas inserted in the main tropical and subtropical South American phytogeographical regions east of the Andes. Here, we present the first molecular phylogeny sampling all the eight genera of the Cynolebiini, using fragments of two mitochondrial and four nuclear genes for 35 species of Cynolebiini plus 19 species as outgroups. The dataset, 4448bp, was analysed under Bayesian and maximum likelihood approaches, providing a relatively well solved tree, which retrieves high support values for the Cynolebiini and most included clades. The resulting tree was used to estimate the time of divergence in included lineages using two cyprinodontiform fossils to calibrate the tree. We further investigated historical biogeography through the likelihood-based DEC model. Our estimates indicate that divergence between the clades comprising New World and Old World aplocheiloids occurred during the Eocene, about 50Mya, much more recent than the Gondwanan fragmentation scenario assumed in previous studies. This estimation is nearly synchronous to estimated splits involving other South American and African vertebrate clades, which have been explained by transoceanic dispersal through an ancient Atlantic island chain during the Palaeogene. We estimate that Cynolebiini split from its sister group Cynopoecilini in the Oligocene, about 25Mya and that Cynolebiini started to diversify giving origin to the present genera during the Miocene, about 20-14Mya. The Cynolebiini had an ancestral origin in the Atlantic Forest and probably were not present in the open vegetation formations of central and northeastern South America until the Middle Miocene, when expansion of dry open vegetation was favoured by cool temperatures and strike seasonality. Initial splitting between the genera Cynolebias and Simpsonichthys during the Miocene (about 14Mya) is attributed to the uplift of the Central Brazilian Plateau.
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Affiliation(s)
- Wilson J E M Costa
- Laboratory of Systematics and Evolution of Teleost Fishes, Institute of Biology, Federal University of Rio de Janeiro, Caixa Postal 68049, CEP 21944-970 Rio de Janeiro, RJ, Brazil.
| | - Pedro F Amorim
- Laboratory of Systematics and Evolution of Teleost Fishes, Institute of Biology, Federal University of Rio de Janeiro, Caixa Postal 68049, CEP 21944-970 Rio de Janeiro, RJ, Brazil.
| | - José Leonardo O Mattos
- Laboratory of Systematics and Evolution of Teleost Fishes, Institute of Biology, Federal University of Rio de Janeiro, Caixa Postal 68049, CEP 21944-970 Rio de Janeiro, RJ, Brazil.
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Costa WJEM. Three new species of the killifish genus Melanorivulus from the central Brazilian Cerrado savanna (Cyprinodontiformes, Aplocheilidae). Zookeys 2017:51-70. [PMID: 28228667 PMCID: PMC5299224 DOI: 10.3897/zookeys.645.10920] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 12/13/2016] [Indexed: 11/12/2022] Open
Abstract
Three new species are described from the Neotropical region comprising the Cerrado savannas of the central Brazilian plateaus, which is among the most important biodiversity centres in the world. These species are considered closely related to Melanorivulusdapazi from the same region, with which they share the presence of a rudimentary interarcual cartilage and a dark reddish brown distal margin on the male anal fin. The group comprising Melanorivulusdapazi and the three new species is here named as the Melanorivulusdapazi species group. Melanorivulusignescenssp. n., from the upper Rio Araguaia basin, is distinguished from all other species of the Melanorivulusdapazi group by the anal-fin colour pattern in males; Melanorivulusflavipinnissp. n. and Melanorivulusregularissp. n. from the Rio Paraguai basin are distinguished from all other congeners of the Melanorivulusdapazi group by the colour pattern of the caudal fin and number of scales in the longitudinal series, respectively. All the new species are further unambiguously diagnosed by unique combinations of morphological characters, including meristic and morphometric data, and colour patterns. This study reinforces the importance of using live colour patterns to diagnose species and species groups of the genus Melanorivulus, but also indicates that osteological characters may be informative for species diagnosis. This study confirms the high diversity of species of Melanorivulus in the central Brazilian Cerrado plateaus already reported in previous studies, indicating that endemic species are often restricted to short segments of a single river drainage.
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Affiliation(s)
- Wilson J E M Costa
- Laboratory of Systematics and Evolution of Teleost Fishes, Institute of Biology, Federal University of Rio de Janeiro, Caixa Postal 68049, CEP 21941-971, Rio de Janeiro, Brazil
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In the shadows: Phylogenomics and coalescent species delimitation unveil cryptic diversity in a Cerrado endemic lizard (Squamata: Tropidurus). Mol Phylogenet Evol 2017; 107:455-465. [DOI: 10.1016/j.ympev.2016.12.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 11/07/2016] [Accepted: 12/07/2016] [Indexed: 11/18/2022]
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Ribeiro-Júnior M, Amaral S. Diversity, distribution, and conservation of lizards (Reptilia: Squamata) in the Brazilian Amazonia. NEOTROPICAL BIODIVERSITY 2017. [DOI: 10.1080/23766808.2016.1236769] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Marco Ribeiro-Júnior
- Museu Paraense Emilio Goeldi Programa de Pós-Graduação em Zoologia UFPA-MPEG, C.P. 399, 66017-970, Belém, Pará, Brazil
| | - Silvana Amaral
- Instituto Nacional de Pesquisas Espaciais, C.P. 515, 12227-010, São José dos Campos, São Paulo, Brazil
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Moritz C, Fujita MK, Rosauer D, Agudo R, Bourke G, Doughty P, Palmer R, Pepper M, Potter S, Pratt R, Scott M, Tonione M, Donnellan S. Multilocus phylogeography reveals nested endemism in a gecko across the monsoonal tropics of Australia. Mol Ecol 2016; 25:1354-66. [DOI: 10.1111/mec.13511] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/16/2015] [Accepted: 11/24/2015] [Indexed: 11/30/2022]
Affiliation(s)
- C. Moritz
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - M. K. Fujita
- Department of Biology; University of Texas at Arlington; Arlington TX 76019 USA
| | - D. Rosauer
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - R. Agudo
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - G. Bourke
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - P. Doughty
- Western Australian Museum; Welshpool WA 6986 Australia
| | - R. Palmer
- Science & Conservation Division; Department of Parks and Wildlife; Woodvale WA 6026 Australia
| | - M. Pepper
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - S. Potter
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - R. Pratt
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - M. Scott
- Research School of Biology; The Australian National University; Acton ACT 2601 Australia
- Centre for Biodiversity Analysis; Acton ACT 2601 Australia
| | - M. Tonione
- Museum of Vertebrate Zoology; University of California; Berkeley CA 94720-3102 USA
| | - S. Donnellan
- South Australian Museum; Adelaide SA 5000 Australia
- School of Biological Sciences; The University of Adelaide; Adelaide SA 5000 Australia
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Gohli J, Selvarajah T, Kirkendall LR, Jordal BH. Globally distributed Xyleborus species reveal recurrent intercontinental dispersal in a landscape of ancient worldwide distributions. BMC Evol Biol 2016; 16:37. [PMID: 26877088 PMCID: PMC4753646 DOI: 10.1186/s12862-016-0610-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 02/04/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Invasive species can have devastating effects on native ecosystems and therefore impose a significant threat to human welfare. The introduction rate of invasive species has accelerated dramatically in recent times due to human activity (anthropogenic effects), with a steadily growing pool of widespread tramp species. We present an in-depth analysis of four pantropical species of Xyleborus ambrosia beetles (Xyleborus volvulus, Xyleborus perforans, Xyleborus ferrugineus, and Xyleborus affinis) with similar ecology (fungus cultivation in dead wood), reproductive biology (permanent inbreeding) and genetic system (haplodiploidy). The unique combination of reproductive traits and broad host plant usage pre-adapts these beetles for colonizing of new areas. RESULTS We found that all four species were broadly distributed long before human-assisted dispersal became common, and that the impact of anthropogenic effects varied among the species. For X. volvulus, X. perforans, and X. affinis there was evidence of ancient establishment in numerous regions, but also of abundant recent introductions into previously colonized areas. For X. ferrugineus, we found clear biogeographical structuring of old clades, but little evidence for recent successful introductions. CONCLUSIONS Our results indicate that current human-aided transoceanic dispersal has strongly affected the genetic makeup of three of the species in this study. However, current biogeographical patterns of all four species are equally, if not more strongly, influenced by ancient establishment on different continents.
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Affiliation(s)
- Jostein Gohli
- Natural History Collections, University Museum of Bergen, University of Bergen, P.O. box 7800, 5020, Bergen, Norway.
| | - Tina Selvarajah
- Department of Biology, University of Bergen, P.O. box 7800, 5020, Bergen, Norway
| | | | - Bjarte H Jordal
- Natural History Collections, University Museum of Bergen, University of Bergen, P.O. box 7800, 5020, Bergen, Norway
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