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de Oliveira TD, de Freitas TR. Investigating the evolutionary dynamics of diploid number variation in Ctenomys (Ctenomyidae, Rodentia). Genet Mol Biol 2024; 46:e20230180. [PMID: 38315881 PMCID: PMC10842476 DOI: 10.1590/1678-4685-gmb-2023-0180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 12/22/2023] [Indexed: 02/07/2024] Open
Abstract
Contrary to predictions from classical hybrid sterility models of chromosomal speciation, some organisms display high rates of karyotype variation. Ctenomys are the current mammals with the greatest interspecific and intraspecific chromosomal variation. A large number of species have been studied cytogenetically. The diploid numbers of chromosomes range from 2n = 10 to 2n = 70. Here, we analyzed karyotype evolution in Ctenomys using comparative phylogenetic methods. We found a strong phylogenetic signal with chromosome number. This refutes the chromosomal megaevolution model, which proposes the independent accumulation of multiple chromosomal rearrangements in each closely related species. We found that Brownian motion (BM) described the observed characteristic changes more thoroughly than the Ornstein-Uhlenbeck and Early-Burst models. This suggests that the evolution of chromosome numbers occurs by a random walk along phylogenetic clades. However, our data indicate that the BM model alone does not fully characterize the chromosomal evolution of Ctenomys.
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Affiliation(s)
- Thays Duarte de Oliveira
- Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal, Porto Alegre, RS, Brazil
| | - Thales R.O. de Freitas
- Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal, Porto Alegre, RS, Brazil
- Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Genética e Biologia Molecular, Porto Alegre, RS, Brazil
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2
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Izidoro TD, Grott SC, Kubiak BB, de Freitas TRO, Alves TC, Almeida EA, Galiano D. Oxidative status of Ctenomys flamarioni (Rodentia: Ctenomyidae) in natural areas with different levels of anthropic activity in southern Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:64710-64718. [PMID: 37072591 DOI: 10.1007/s11356-023-27083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Rampant urbanization in coastal environments turns areas close to the seafront into a highly impacted ecosystem, possibly affecting the health and well-being of resident animal species. The tuco-tuco Ctenomys flamarioni is an endemic and endangered subterranean mammal from southern Brazil, and the anthropic influence was considered one of the main threats to the species. In this context, the present study aimed to investigate the patterns of oxidative status of the species in natural areas with different levels of anthropogenic disturbance. We evaluated two populations of C. flamarioni, one located in an area with intense anthropogenic impact due to urbanization and tourist activity, and the other in a non-impacted area. Oxidative injury parameters (lipid peroxidation and carbonylated protein levels), and the activities of the antioxidant enzymes superoxide dismutase, catalase, glutathione peroxidase, glucose 6-phosphate dehydrogenase, glutathione S-transferase and carboxylesterase were measured. Individuals inhabiting the impacted area had lower G6PDH activity and higher levels of carbonylated proteins. This combination of higher level of oxidative damage and lower antioxidant activity is an indication that the oxidative status of animals in the impacted population is possibly being affected as a consequence of anthropogenic activities in this environment. The values of the parameters obtained in the current study can be used as a reference of the oxidative state of C. flamarioni in future studies with tuco-tucos.
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Affiliation(s)
- Tays Daiane Izidoro
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Suelen Cristina Grott
- Programa de Pós-Graduação Em Engenharia Ambiental, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Bruno Busnello Kubiak
- Universidade Federal Do Rio Grande Do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, RS, 91501-970, Brazil
| | | | - Thiago Caique Alves
- Programa de Pós-Graduação Em Engenharia Ambiental, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Eduardo Alves Almeida
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil
| | - Daniel Galiano
- Programa de Pós-Graduação Em Biodiversidade, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, 89030-903, Brazil.
- Universidade Federal da Fronteira Sul, Campus Realeza, Rua Edmundo Gaievisk, 1000, Realeza, PR, 85770-000, Brazil.
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3
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Verzi DH, De Santi NA, Olivares AI, Morgan CC, Basso NG, Brook F. A new species of the highly polytypic South American rodent Ctenomys increases the diversity of the magellanicus clade. VERTEBRATE ZOOLOGY 2023. [DOI: 10.3897/vz.73.e96656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
The subterranean rodent Ctenomys is the most polytypic South American mammal genus and one of the most speciose and rapidly diversifying mammal genera in the world. Its systematics is unstable due to the underlying accelerated diversification processes that give rise to evolutionary lineages at different stages of differentiation and to remarkable morphological homogeneity even among long-differentiated species. As a result, species boundaries are often difficult to define. Diversity of this genus in the coastal area of central Argentina has been extensively studied, with two independent lineages currently recognized while a distinct third population had not been previously detected. Through a phylogenetic analysis based on combined morphological and molecular evidence, Bayesian estimates of divergence times, and morphometric and morphological assessments, we recognize this third population as an independently evolving lineage. The new species, Ctenomys pulcersp. nov., is here described for both the living fauna and the fossil record of the Pampean region of central Argentina. According to phylogenetic results, Ctenomys pulcersp. nov. belongs to the essentially Patagonian magellanicus clade, and would have diverged from its sister species, Ctenomys bidaui, during the middle Pleistocene (ca. 0.4 Ma). Its current distribution in the fixed and semifixed dunes of the coastal Pampean region is assumed to represent a relict of a wider and continuous distribution of potentially suitable environments during the late Pleistocene. Ctenomys pulcersp. nov. occurs in a particularly fragile natural system subjected to profound disturbances caused by diverse anthropic actions and therefore measures for the conservation of its habitat will be indispensable.
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4
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Austrich A, Tomasco IH, Mapelli FJ, Kittlein MJ, Cutrera AP, Mora MS. Appearances are deceptive: a cryptic lineage within the assumed distributional boundaries of Ctenomys talarum (Rodentia, Ctenomyidae). J Mammal 2023. [DOI: 10.1093/jmammal/gyac116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Abstract
The coastal dunes of the southeast of Buenos Aires province, Argentina, present two different described species of tuco-tucos: Ctenomys talarum and C. australis. Formerly, C. talarum was subdivided into three subspecies (C. t. talarum, C. t. recessus, and C. t. occidentalis), mainly based on its geographic distribution and phenotypic variation in characters of external morphology (e.g., body size and pelage color). This study assesses the phylogenetic relationships of C. talarum, focusing on the populations at the western end of its coastal distribution (localities of Pehuen-Có and Sauce Grande), which have been previously identified as highly genetically divergent. In this regard, populations distributed throughout the range of the species were sampled. Complete DNA sequences of the mitochondrial cytochrome b gene (1,140 bp), partial sequences of the mitochondrial D-loop region (426 bp), and partial sequences of the nuclear DNA intron 8 of the β-fibrinogen (about 870 bp) gene were used for the analyses. Phylogenetic inferences based on mitochondrial and nuclear markers were performed separately or combined to obtain a species tree. Populations distributed at the western end of the coastal dunes (between Pehuen-Có and Sauce Grande), previously assumed as C. talarum, were found to belong to an independent lineage relative to the other populations from the Pampas region. The average genetic distance between these two lineages is within the order of the genetic distances observed between different species of the genus. Also, our results show that this lineage of Ctenomys presents a high affinity with the magellanicus group, which is distributed further south, in Patagonia. In conclusion, tuco-tuco populations occurring in the coastal expanse between these two localities should be considered a possible distinct cryptic species, highly differentiated from C. talarum.
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Affiliation(s)
- Ailin Austrich
- Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata , Dean Funes 3250, 3rd Floor, 7600 Mar del Plata , Argentina
| | - Ivanna Haydée Tomasco
- Departamento de Ecología y Evolución, Facultad de Ciencias, Universidad de la República , Iguá 4225, Montevideo 11400 , Uruguay
| | - Fernando Javier Mapelli
- División Mastozoología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” CONICET , Angel Gallardo 470, Buenos Aires C1405DJR , Argentina
| | - Marcelo Javier Kittlein
- Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata , Dean Funes 3250, 3rd Floor, 7600 Mar del Plata , Argentina
| | - Ana Paula Cutrera
- Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata , Dean Funes 3250, 3rd Floor, 7600 Mar del Plata , Argentina
| | - Matías Sebastián Mora
- Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata , Dean Funes 3250, 3rd Floor, 7600 Mar del Plata , Argentina
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Mapelli FJ, Teta P, Contreras F, Pereyra D, Priotto JW, Coda JA. Looking under stones: A new Ctenomys species from the rocky foothills of the Sierras Grandes of central Argentina. J MAMM EVOL 2022. [DOI: 10.1007/s10914-022-09634-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Comprehensive cytogenetic analysis of the most chromosomally variable mammalian genus from South America: Ctenomys (Rodentia: Caviomorpha: Ctenomyidae). Mamm Biol 2022. [DOI: 10.1007/s42991-022-00312-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Brook F, Tomasco IH, González B, Martin GM. A New Species of Ctenomys (Rodentia: Ctenomyidae) from Patagonia Related to C. sociabilis. J MAMM EVOL 2021. [DOI: 10.1007/s10914-021-09570-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Prado JR, Percequillo AR, Pirani RM, Thomaz AT. Phenotypic and genomic differences between biomes of the South America marsh rat, Holochilus brasiliensis. Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Abiotic factors can influence genetic and phenotypic divergence in several ways, and identifying the mechanisms responsible for generating this variation is challenging. However, when evaluated in combination, ecological characteristics and genetic and phenotypic information can help us to understand how habitat preferences can influence morphological and genetic patterns exhibited by taxa distributed between distinct biomes, such as the Atlantic Forest and Pampas biomes in South America. By combining distributional, environmental, phenotypic and genomic information from a habitat-specialist semi-aquatic rodent (Holochilus brasiliensis), we quantified the relationship between ecological niche differences and the phenotypic and genetic variation. The results demonstrate notable segregation among the ecological niches of H. brasiliensis within each biome, although we could not refute the hypothesis of niche similarity or equivalency. Such differences are consistent with a solid morphometric variation associated with the size of these rodents. However, the ecological and morphometric differentiation is not accompanied by the same pattern of genetic variation. Despite differences in the connectivity patterns in both biomes, the genetic differences corroborate a consistent level of migration history between biomes. Additionally, the association tests show that the environment explains a small and non- significant part of the genetic variation but a significant portion of the morphometric variation.
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Affiliation(s)
- Joyce R Prado
- Departamento de Ciências Biológicas, Escola Superior de Agricultura ‘Luiz de Queiroz’, Universidade de São Paulo, Piracicaba, SP, Brazil
| | - Alexandre R Percequillo
- Departamento de Ciências Biológicas, Escola Superior de Agricultura ‘Luiz de Queiroz’, Universidade de São Paulo, Piracicaba, SP, Brazil
| | - Renata M Pirani
- Biology Department, University of Nevada-Reno, Reno, NV, USA
| | - Andrea T Thomaz
- Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, DC, Colombia
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9
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Tammone MN, Lacey EA, Voglino D, Cuéllar Soto E, Pardiñas UFJ. Disentangling the complex alpha taxonomy of Andean populations of Ctenomys (Rodentia: Ctenomyidae) from northern Patagonia: the need for extensive sampling in heterogeneous landscapes. J Mammal 2021. [DOI: 10.1093/jmammal/gyab089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
In the Andean portion of northern Patagonia, populations of Ctenomys are found from low-elevation plains to high-elevation meadows and valleys. Despite their prevalence, the taxonomy of these subterranean rodents remains poorly resolved. Using genetic and morphological data obtained from museum specimens and animals collected in the field, we examined the taxonomy of Ctenomys from southwestern Mendoza Province, Argentina. Our analyses suggest the presence of at least five species of Ctenomys within the study area. The highest, innermost portion of the Andes is occupied by C. maulinus. To the east, the mountains and foothills are inhabited by two forms associated with the “mendocinus” and the “magellanicus” lineages, respectively. The former appears to be a local variant of C. emilianus, while the latter is sister to C. pontifex. Although C. pontifex was not encountered during our field sampling, it remains a valid species that likely is restricted to the isolated Valle Hermoso in westernmost Mendoza Province. In addition, we report an undescribed form from Las Leñas Valley that is associated with the “mendocinus” lineage. This complex alpha taxonomic scenario occurs within less than one degree of latitude, thereby highlighting the need to conduct detailed field collections to improve our knowledge of the systematics of Ctenomys.
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Affiliation(s)
- Mauro N Tammone
- Instituto de Investigaciones en Biodiversidad y Medioambiente (CONICET-UNComahue), Quintral 1250, 8400 Bariloche, Río Negro, Argentina
- Parque Nacional Nahuel Huapi (CENAC-CONICET), 8400 Bariloche, Río Negro, Argentina
| | - Eileen A Lacey
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, 94720 Berkeley, California, USA
| | - Damián Voglino
- Museo de Ciencias Naturales Antonio Scasso, 2900 San Nicolás de los Arroyos, Buenos Aires, Argentina
| | - Erika Cuéllar Soto
- College of Science, Department of Biology, 123 Sultan Qaboos University, Muscat, Oman
| | - Ulyses F J Pardiñas
- Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Boulevard Brown 2915, 9120 Puerto Madryn, Chubut, Argentina
- Instituto Nacional de Biodiversidad, 170135 Quito, Ecuador
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10
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Carnovale CS, Fernández GP, Merino ML, Mora MS. Redefining the Distributional Boundaries and Phylogenetic Relationships for Ctenomids From Central Argentina. Front Genet 2021; 12:698134. [PMID: 34422000 PMCID: PMC8372524 DOI: 10.3389/fgene.2021.698134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/06/2021] [Indexed: 11/13/2022] Open
Abstract
With about 68 recognized living species, subterranean rodents of the genus Ctenomys are found in a multiplicity of habitats, from the dunes of the Atlantic coast to the Andes Mountains, including environments ranging from humid steppes of Pampas to the dry deserts of Chaco region. However, this genus needs an exhaustive reevaluation of its systematic and phylogenetic relationships regarding the different groups that compose it. This knowledge is essential to propose biodiversity conservation strategies both at species level and at higher hierarchical levels. In order to clarify the taxonomy and the recent evolutionary history from populations of Ctenomys in the Pampas region, Argentina, phylogenetic relationships among them were evaluated using mitochondrial DNA sequences: gene encoding cytochrome b protein (1,140 bp) and the non-coding D-loop region (434 bp). To infer the divergence times inside the Ctenomys clade, a Bayesian calibrate tree using fossil remains data from different families within Caviomorpha was performed at first. Secondly, that calibration data was used as priors in a new Bayesian phylogenetic inference within the genus Ctenomys. This phylogenetic tree emphasized on species currently distributed on the Pampas region, more precisely considering both the talarum and mendocinus groups. Bayesian inferences (BI) were integrated with the results of a Maximum Likelihood approach (ML). Based on these results, the distributional limits of the mendocinus and talarum groups appear to be related to the physiognomy of the Pampas region soils. On the other hand, the validity of C. pundti complex as a differentiated species of C. talarum is debated. According to previous evidence from morphological and chromosomal studies, these results show a very low divergence between those species that originally were classified within the talarum group. Mitochondrial DNA sequences from populations associated with these putative species have not recovered as reciprocal monophyletic groups in the phylogenetic analyses. In conclusion, C. talarum and C. pundti complex might be considered as the same biological species, or lineages going through a recent or incipient differentiation process. The results obtained in this study have important implications for conservation policies and practices, since both species are currently categorized as Vulnerable and Endangered, respectively.
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Affiliation(s)
- Cecilia Soledad Carnovale
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina
| | - Gabriela Paula Fernández
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina
| | - Mariano Lisandro Merino
- Centro de Bioinvestigaciones (CeBio), Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA-CICBA) / Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-CONICET), Pergamino, Argentina.,Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICBA), La Plata, Argentina
| | - Matías Sebastián Mora
- Grupo de Investigación: Ecología y Genética de Poblaciones de Mamíferos, Instituto de Investigaciones Marinas y Costeras (IIMyC, CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata, Argentina
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11
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Medeiros MD, Galiano D, Kubiak BB, Roratto PA, de Freitas TRO. Genetic diversity and conservation of the endemic tuco-tuco Ctenomys ibicuiensis (Rodentia: Ctenomyidae). J Mammal 2020. [DOI: 10.1093/jmammal/gyaa119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Endemic, small range species are susceptible to environmental changes and landscape modification. Understanding genetic diversity and distributional patterns is important for implementation of effective conservation measures. In this context, genetic diversity was evaluated to update the conservation status of an endemic tuco-tuco, Ctenomys ibicuiensis. Phylogeographic and population genetic analyses of mitochondrial DNA and microsatellite loci were carried out using 46 individuals sampled across the species’ distribution. Ctenomys ibicuiensis presented moderate to high genetic diversity and highly structured populations with low levels of gene flow and isolation by distance. Anthropogenic landscape changes threaten this restricted-range tuco-tuco. Considering its limited geographic distribution and highly structured populations with low gene flow, we consider C. ibicuiensis to be at significant risk of extinction.
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Affiliation(s)
- Mayara Delagnelo Medeiros
- Programa de Pós-Graduação em Genética e Biologia Molecular – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Daniel Galiano
- Universidade Federal da Fronteira Sul, Campus Realeza, Realeza, PR, Brazil
| | - Bruno Busnello Kubiak
- Programa de Pós-Graduação em Genética e Biologia Molecular – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Paula Angélica Roratto
- Departamento de Ciências Naturais – Fundação Universidade Regional de Blumenau (FURB), Blumenau, SC, Brazil
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12
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Teta P, D'Elía G. Uncovering the species diversity of subterranean rodents at the end of the World: three new species of Patagonian tuco-tucos (Rodentia, Hystricomorpha, Ctenomys). PeerJ 2020; 8:e9259. [PMID: 32523815 PMCID: PMC7263298 DOI: 10.7717/peerj.9259] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/09/2020] [Indexed: 11/20/2022] Open
Abstract
Ctenomys Blainville 1826 is one of the most diverse genera of South American caviomorph rodents. Currently, six species of this genus are reported from Patagonia, south of 42°S. In this contribution, we assessed the taxonomic status of several populations from eastern and central Chubut province, northern Patagonia. Based on phylogenetic analyses of DNA sequences, morphology assessment (qualitative and quantitative), and previously published karyological data, we describe three new species of this genus, one formed by two subspecies, endemic to northern Patagonia. In addition, we include C. coyhaiquensis Kelt and Gallardo 1994 into the synonymy of C. sericeus J.A. Allen 1903. Finally, we discussed the need for additional integrative approaches, including field collection of specimens, to better understand the diversity of this highly speciose rodent genus.
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Affiliation(s)
- Pablo Teta
- División Mastozoología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, Argentina
| | - Guillermo D'Elía
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
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13
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Teta P, D’Elía G, Opazo JC. Integrative taxonomy of the southernmost tucu-tucus in the world: differentiation of the nominal forms associated with Ctenomys magellanicus Bennett, 1836 (Rodentia, Hystricomorpha, Ctenomyidae). Mamm Biol 2020. [DOI: 10.1007/s42991-020-00015-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Conservation status, protected area coverage of Ctenomys (Rodentia, Ctenomyidae) species and molecular identification of a population in a national park. Mamm Biol 2020. [DOI: 10.1007/s42991-019-00004-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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D’Elía G, Fabre PH, Lessa EP. Rodent systematics in an age of discovery: recent advances and prospects. J Mammal 2019. [DOI: 10.1093/jmammal/gyy179] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Guillermo D’Elía
- Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Pierre-Henri Fabre
- Institut des Sciences de l’Evolution (ISEM, UMR 5554 CNRS-UM2-IRD), Université Montpellier, Montpellier Cedex 5, France
| | - Enrique P Lessa
- Departamento de Ecología y Evolución, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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16
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Lineages of Tuco-Tucos (Ctenomyidae: Rodentia) from Midwest and Northern Brazil: Late Irradiations of Subterranean Rodents Towards the Amazon Forest. J MAMM EVOL 2018. [DOI: 10.1007/s10914-018-9450-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Redescription and phylogenetic position of Ctenomys dorsalis Thomas 1900, an enigmatic tuco tuco (Rodentia, Ctenomyidae) from the Paraguayan Chaco. MAMMALIA 2018. [DOI: 10.1515/mammalia-2018-0049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Ctenomys dorsalis is known only from its type specimen, a female preserved as skin without skull (except for the upper incisors) from an imprecise locality in the “Northern Chaco of Paraguay”. Here, we report additional individuals of this species housed, since the 1940s, at the Field Museum of Natural History (Chicago, USA). Based on these specimens, which fully match the original description of this rodent, we provide novel information regarding its phylogenetic position, external and cranial morphology, and distribution. The analysis of mtDNA sequences supports the distinctiveness of this taxon and suggests its placement within the boliviensis group of Ctenomys. Our study highlights once more the importance of museum collections as repositories of biodiversity.
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18
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Integrative analysis of chromosome banding, telomere localization and molecular genetics in the highly variable Ctenomys of the Corrientes group (Rodentia; Ctenomyidae). Genetica 2018; 146:403-414. [PMID: 30076493 DOI: 10.1007/s10709-018-0032-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 07/27/2018] [Indexed: 02/04/2023]
Abstract
The genus Ctenomys comprises about 70 species with great chromosome diversity. The Corrientes group is one of the most chromosomally variable lineages in the genus, where the diploid number (2n) varies from 41 to 70. In this group, three nominal species and numerous polymorphic and polytypic populations have been described. In order to get insight into the chromosomal evolution of this species complex, we applied different banding and molecular cytogenetic techniques. The results were interpreted in an evolutionary context, based on mitochondrial cytochrome b analyses. Studied samples are representative of the broad chromosomal variability in the group, including specimens with 2n = 42 to 2n = 70. Heterochromatin was scarce but concentrated in a few chromosomes. Centromeric DAPI-negative heterochromatin was observed in some autosomal pairs, which differed among populations. Location and amount of DAPI-neutral heterochromatin within the Y chromosome varied among populations. The variable distribution of heterochromatin indicates its dynamic behavior. NORs were detected in one pair of autosomes, which also differed among some populations. Telomeric FISH signals were observed in all complements only at the chromosome ends. The Corrientes group belongs to a clade that also includes C. pearsoni, C. lami, C. minutus, C. ibicuiensis and C. torquatus. Almost all of these species are variable at the chromosomal level, suggesting that this is the ancestral condition of the clade. Within the Corrientes group, the observed low genetic divergence, in contrast with its high chromosomal variability, is indicative of decoupling between the rates of chromosomal and mitochondrial evolution.
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Fornel R, Cordeiro-Estrela P, de Freitas TRO. Skull shape and size variation within and between mendocinus and torquatus groups in the genus Ctenomys (Rodentia: Ctenomyidae) in chromosomal polymorphism context. Genet Mol Biol 2018; 41:263-272. [PMID: 29668015 PMCID: PMC5913726 DOI: 10.1590/1678-4685-gmb-2017-0074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 11/23/2017] [Indexed: 11/22/2022] Open
Abstract
We tested the association between chromosomal polymorphism and skull shape and size variation in two groups of the subterranean rodent Ctenomys. The hypothesis is based on the premise that chromosomal rearrangements in small populations, as it occurs in Ctenomys, produce reproductive isolation and allow the independent diversification of populations. The mendocinus group has species with low chromosomal diploid number variation (2n=46-48), while species from the torquatus group have a higher karyotype variation (2n=42-70). We analyzed the shape and size variation of skull and mandible by a geometric morphometric approach, with univariate and multivariate statistical analysis in 12 species from mendocinus and torquatus groups of the genus Ctenomys. We used 763 adult skulls in dorsal, ventral, and lateral views, and 515 mandibles in lateral view and 93 landmarks in four views. Although we expected more phenotypic variation in the torquatus than the mendocinus group, our results rejected the hypothesis of an association between chromosomal polymorphism and skull shape and size variation. Moreover, the torquatus group did not show more variation than mendocinus. Habitat heterogeneity associated to biomechanical constraints and other factors like geography, phylogeny, and demography, may affect skull morphological evolution in Ctenomys.
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Affiliation(s)
- Rodrigo Fornel
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Universidade Regional Integrada do Alto Uruguai e das Missões - Campus de Erechim, Erechim, RS, Brazil
| | - Pedro Cordeiro-Estrela
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza - Campus I, Universidade Federal da Paraíba, João Pessoa, PB, Brazil
| | - Thales Renato O de Freitas
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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20
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Ramos-Fregonezi AMC, Malabarba LR, Fagundes NJR. Population Genetic Structure of Cnesterodon decemmaculatus (Poeciliidae): A Freshwater Look at the Pampa Biome in Southern South America. Front Genet 2017; 8:214. [PMID: 29312439 PMCID: PMC5742129 DOI: 10.3389/fgene.2017.00214] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 12/04/2017] [Indexed: 11/13/2022] Open
Abstract
The Pampas is a Neotropical biome formed primarily by low altitude grasslands and encompasses the southernmost portion of Brazil, Uruguay, and part of Argentina. Despite the high level of endemism, and its significant environmental heterogeneity, Pampean species are underrepresented in phylogeographic studies, especially aquatic organisms. The Pampean hydrological system resulted from a long history of tectonism, climate, and sea level changes since the Neogene. In this study, we examined the population genetic structure of Cnesterodon decemmaculatus, a freshwater fish species that occurs throughout most of the Pampa biome. We characterized mitochondrial and autosomal genetic lineages in populations sampled from Southern Brazil and Uruguay to investigate (1) the correspondence between current drainage systems and evolutionary lineages, (2) the demographic history for each genetic lineage, and (3) the temporal depth of these lineages. Overall, we found that the major evolutionary lineages in this species are strongly related to the main Pampean drainage systems, even though stream capture events may have affected the distribution of genetic lineages among drainages. There was evidence for recent population growth in the lineages occupying drainages closest to the shore, which may indicate the effect of quaternary sea-level changes. In general, divergence time estimates among evolutionary lineages were shallow, ranging from 20,000 to 800,000 years before present, indicating a geologically recent history for this group, as previously reported in other Pampean species. A Bayesian phylogeographical reconstruction suggested that an ancestral lineage probably colonized the Uruguay River Basin, and then expanded throughout the Pampas. This evolutionary scenario may represent useful starting models for other freshwater species having a similar distribution.
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Affiliation(s)
- Aline M C Ramos-Fregonezi
- Laboratory of Medical and Evolutionary Genetics, Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Laboratory of Bioinformatics and Evolution, Department of General Biology, Federal University of Viçosa, Viçosa, Brazil
| | - Luiz R Malabarba
- Laboratory of Ichthyology, Department of Zoology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Nelson J R Fagundes
- Laboratory of Medical and Evolutionary Genetics, Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Borges LR, Maestri R, Kubiak BB, Galiano D, Fornel R, Freitas TRO. The role of soil features in shaping the bite force and related skull and mandible morphology in the subterranean rodents of genus
Ctenomys
(Hystricognathi: Ctenomyidae). J Zool (1987) 2016. [DOI: 10.1111/jzo.12398] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- L. R. Borges
- Programa de Pós‐Graduação em Biologia Animal Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - R. Maestri
- Programa de Pós‐Graduação em Ecologia Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - B. B. Kubiak
- Programa de Pós‐Graduação em Biologia Animal Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - D. Galiano
- Programa de Pós‐Graduação em Ciências Ambientais Universidade Comunitária da Região de Chapecó Chapecó SC Brazil
| | - R. Fornel
- Programa de Pós‐Graduação em Ecologia Universidade Regional Integrada do Alto Uruguai e das Missões Erechim RS Brazil
| | - T. R. O. Freitas
- Departamento de Genética Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
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22
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Catalano SA, Torres A. Phylogenetic inference based on landmark data in 41 empirical data sets. ZOOL SCR 2016. [DOI: 10.1111/zsc.12186] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Santiago A. Catalano
- Consejo Nacional de Investigaciones Científicas y Técnicas; Unidad Ejecutora Lillo (UEL); FML-CONICET; Miguel Lillo 251, 4000 San Miguel de Tucumán Tucumán Argentina
| | - Ambrosio Torres
- Consejo Nacional de Investigaciones Científicas y Técnicas; Unidad Ejecutora Lillo (UEL); FML-CONICET; Miguel Lillo 251, 4000 San Miguel de Tucumán Tucumán Argentina
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Felappi JF, Vieira RC, Fagundes NJR, Verrastro LV. So far away, yet so close: strong genetic structure in Homonota uruguayensis (Squamata, Phyllodactylidae), a species with restricted geographic distribution in the Brazilian and Uruguayan Pampas. PLoS One 2015; 10:e0118162. [PMID: 25692471 PMCID: PMC4334718 DOI: 10.1371/journal.pone.0118162] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 01/08/2015] [Indexed: 11/19/2022] Open
Abstract
The Pampas is a biologically rich South American biome, but is poorly represented in phylogeographic studies. While the Pleistocene glacial cycles may have affected the evolutionary history of species distributed in forested biomes, little is known about their effects on the habitats that remained stable through glacial cycles. The South American Pampas have been covered by grasslands during both glacial and interglacial periods and therefore represent an interesting system to test whether the genetic structure in such environments is less pronounced. In this study, we sampled Pampean populations of Homonota uruguayensis from Southern Brazil and Uruguay to assess the tempo and mode of population divergence, using both morphological measurements and molecular markers. Our results indicate that, in spite of its narrow geographic distribution, populations of H. uruguayensis show high levels of genetic structure. We found four major well-supported mtDNA clades with strong geographic associations. Estimates of their divergence times fell between 3.16 and 1.82 million years before the present. Populations from the central portion of the species distribution, on the border between Uruguay and Brazil, have high genetic diversity and may have undergone a population expansion approximately 250,000 years before the present. The high degree of genetic structure is reflected in the analyses of morphological characters, and most individuals could be correctly assigned to their parental population based on morphology alone. Finally, we discuss the biogeographic and conservation implications of these findings.
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Affiliation(s)
- Jéssica F. Felappi
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Renata C. Vieira
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Nelson J. R. Fagundes
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Laura V. Verrastro
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Catalano SA, Ercoli MD, Prevosti FJ. The More, the Better: The Use of Multiple Landmark Configurations to Solve the Phylogenetic Relationships in Musteloids. Syst Biol 2014; 64:294-306. [DOI: 10.1093/sysbio/syu107] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Santiago A. Catalano
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
| | - Marcos D. Ercoli
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
| | - Francisco J. Prevosti
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas; 2Unidad Ejecutora Lillo (UEL), Miguel Lillo 251, 4000 S.M. de Tucumán, Argentina; 3Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470. C1405DJ Buenos Aires, Argentina; and 4Departamento de Ciencias Básicas, Universidad Nacional de Luján, Luján, Buenos Aires, Argentina
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Patterson BD, Upham NS. A newly recognized family from the Horn of Africa, the Heterocephalidae (Rodentia: Ctenohystrica). Zool J Linn Soc 2014. [DOI: 10.1111/zoj.12201] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Bruce D. Patterson
- Integrative Research Center; Field Museum of Natural History; 1400 S. Lake Shore Drive Chicago 60605 IL USA
| | - Nathan S. Upham
- Committee on Evolutionary Biology; University of Chicago; 5734 S. Ellis Ave Chicago 60637 IL USA
- Department of Biology; McMaster University; 1280 Main Street West Hamilton L8S4L8 ON Canada
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