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Cabral H, Cacciali P, Santana DJ. Evolution of the rostral scale and mimicry in the genus Xenodon Boie, 1826 (Serpentes: Dipsadidae: Xenodontinae). Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blac086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Snakes are a stimulating life form from an evolutionary perspective. Despite the basic morphological body shape (limbless, with a tubular body), these vertebrates are extremely diverse. The Neotropical region is one of the most diverse regions for snakes in the world, with >650 known species. Within this great diversity, the genus Xenodon includes 12 species with interesting adaptations to terrestrial and semi-fossorial habitats. Members of this genus are mostly diurnal and terrestrial, feed mainly on anurans and exhibit Batesian mimicry of venomous snakes of the genera Bothrops or Micrurus. Here, through phylogenetic analysis and ancestral state estimation, we explore the evolution of the rostral scale and mimicry within the genus Xenodon. Our results suggest that the ancestral lineage of Xenodon had a rounded rostral scale and exhibited Bothrops mimicry. The evolution of the rostral scale in Xenodon might be related to abiotic factors, as an adaptation for open and forested habitats, and mimicry is likely to be related to biotic factors, as a defensive strategy resembling those of venomous snakes.
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Affiliation(s)
- Hugo Cabral
- Programa de Pós-Graduação em Biologia Animal, Universidade Estadual Paulista , São José do Rio Preto, SP , Brazil
- Instituto de Investigación Biológica del Paraguay , Del Escudo 1607, Asunción , Paraguay
- Asociación Guyra Paraguay , Avenida Coronel Carlos Bóveda, Parque Asunción Verde, Viñas Cué , Paraguay
| | - Pier Cacciali
- Instituto de Investigación Biológica del Paraguay , Del Escudo 1607, Asunción , Paraguay
- Asociación Guyra Paraguay , Avenida Coronel Carlos Bóveda, Parque Asunción Verde, Viñas Cué , Paraguay
| | - Diego José Santana
- Mapinguari Lab, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul , 79002-970, Campo Grande, MS , Brazil
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Dubeux MJM, Araújo Neto JVD, Triburcio ICS, Lisboa BS, Torquato S, Freitas MAD, Freire EMX, Guarnieri MC, Mott T. A “hotspot” within a hotspot: the reptiles of the Estação Ecológica and Área de Proteção Ambiental de Murici, Atlantic Forest of northeastern Brazil. BIOTA NEOTROPICA 2022. [DOI: 10.1590/1676-0611-bn-2022-1337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: Currently the Atlantic Forest hotspot has less than 11% of its original coverage. However approximately 300 species of reptiles are known to inhabit this ecoregion, of which 34% are endemic. The creation of protected areas represents a strategy for preserving ecosystems and managing land use, and for attaining the proper management of these protected areas, information on local biodiversity is essential. Herein we provide the first list of reptile species for the Estação Ecológica and Área de Proteção Ambiental de Murici, two overlapping protected areas located in the state of Alagoas, one of the most important sets of forest remnants for the conservation of the Atlantic Forest in the northeast of Brazil. The species list was constructed based on expeditions and occasional encounters in the area between 1994 and 2022. A total of 89 reptile species were obtained during the 28 years of collection, being two species of Crocodylia, three species of Testudines and 84 species of Squamata. This richness is by far one of the greatest ever documented for the Atlantic Forest. Additionally, two species registered in the area are considered threatened according to the national list (Amerotyphlops paucisquamus and Bothrops muriciensis) and six are defined as data deficient for the assessment of their conservation status. Three species are recorded for the first time in the Atlantic Forest north of the São Francisco River: Dipsas indica, Trilepida salgueiroi and Cercophis auratus. We claim that the species list provided here will serve as a starting point for further studies in this rich reptile “hotspot” within the Atlantic Forest.
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Affiliation(s)
- Marcos Jorge Matias Dubeux
- Universidade Federal de Pernambuco, Brasil; Universidade Federal de Alagoas, Brasil; Universidade Federal de Alagoas, Brasil
| | | | | | - Barnagleison Silva Lisboa
- Universidade Federal de Pernambuco, Brasil; Universidade Federal de Alagoas, Brasil; Instituto Federal de Alagoas, Brasil
| | | | | | | | | | - Tamí Mott
- Universidade Federal de Alagoas, Brasil; Universidade Federal de Alagoas, Brasil
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Bernarde PS, Pucca MB, Mota-da-Silva A, da Fonseca WL, de Almeida MRN, de Oliveira IS, Cerni FA, Gobbi Grazziotin F, Sartim MA, Sachett J, Wen FH, Moura-da-Silva AM, Monteiro WM. Bothrops bilineatus: An Arboreal Pitviper in the Amazon and Atlantic Forest. Front Immunol 2021; 12:778302. [PMID: 34975866 PMCID: PMC8714932 DOI: 10.3389/fimmu.2021.778302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/25/2021] [Indexed: 11/13/2022] Open
Abstract
The two-striped forest-pitviper (Bothrops bilineatus) is an arboreal snake that is currently represented by two subspecies (B. b. bilineatus and B. b. smaragdinus) that comprise a species complex, and its distribution is in the Amazon and the Atlantic Forest. The rarity of encounters with this snake is reflected in the low occurrence of cases of snakebites throughout its geographic distribution and the resulting low number of published clinical reports. However, in some areas, B. bilineatus proves to be more frequent and causes envenomations in a greater proportion. Herein, we review the main aspects of the species complex B. bilineatus, including its biology, ecology, taxonomy, morphology, genetic and molecular studies, geographic distribution, conservation status, venom, pathophysiology and clinical aspects, and epidemiology. In addition, the different antivenoms available for the treatment of envenomations caused by B. bilineatus are presented along with suggestions for future studies that are needed for a better understanding of the snakebites caused by this snake.
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Affiliation(s)
- Paulo Sérgio Bernarde
- Laboratório de Herpetologia, Universidade Federal do Acre, Cruzeiro do Sul, Brazil
- *Correspondence: Paulo Sérgio Bernarde, ; Wuelton M. Monteiro,
| | - Manuela Berto Pucca
- Curso de Medicina, Universidade Federal de Roraima, Boa Vista, Brazil
- Programa de Pós-graduação em Ciências da Saúde, Universidade Federal de Roraima, Boa Vista, Brazil
| | | | | | | | - Isadora Sousa de Oliveira
- Departamento de Ciências Biomoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Felipe Augusto Cerni
- Programa de Pós-graduação em Ciências da Saúde, Universidade Federal de Roraima, Boa Vista, Brazil
| | | | - Marco A. Sartim
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil
- Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil
- Departamento de Pós-Graduação, Universidade Nilton Lins, Manaus, Brazil
| | - Jacqueline Sachett
- Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas, Manaus, Brazil
- Departamento de Ensino e Pesquisa, Fundação Alfredo da Matta, Manaus, Brazil
| | - Fan Hui Wen
- Núcleo Estratégico de Venenos e Antivenenos, Instituto Butantan, São Paulo, Brazil
| | - Ana Maria Moura-da-Silva
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil
- Laboratório de Imunopatologia, Instituto Butantan, São Paulo, Brazil
| | - Wuelton M. Monteiro
- Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil
- Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas, Manaus, Brazil
- *Correspondence: Paulo Sérgio Bernarde, ; Wuelton M. Monteiro,
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Marques R, Guedes TB, Lanna FM, Passos DC, Silva WPDA, Garda AA. Species richness and distribution patterns of the snake fauna of Rio Grande do Norte state, northeastern Brazil. AN ACAD BRAS CIENC 2021; 93:e20191265. [PMID: 34431862 DOI: 10.1590/0001-3765202120191265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 07/05/2020] [Indexed: 11/22/2022] Open
Abstract
The Neotropics are one of the richest regions in biodiversity globally. Still, much remains unknown about the mechanisms and processes responsible for the accumulation of species in this region. Among the many limitations on our current knowledge on the region's biodiversity, understanding of community composition and species distributions is limited and greatly biased in many Brazilian regions. We present information on species composition, habitat use, geographic distribution, taxonomic accounts, and conservation of snakes from Rio Grande do Norte state, Northeastern Brazil. We compiled, from primary and literature data, 851 snake records from seven families and 47 species, with five new records for the state. Species are mainly terrestrial and semi-arboreal and associated with at least six vegetation types from Caatinga and Atlantic Forest domains. None of the species is listed in threatened categories of IUCN, while two species are listed in the Brazilian Threatened Fauna list. Our data covers 32.34% of the state's area, a consequence of locally limited inventories and lack of long-term studies on snakes' fauna. The richest areas within the state are near large cities, which lack protected areas for the species they harbor, and highlights the necessity of protective policies and conservation actions.
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Affiliation(s)
- Ricardo Marques
- Universidade Federal da Paraíba, Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Centro de Ciências Exatas e da Natureza, Departamento de Sistemática e Ecologia, Campus I - Cidade Universitaria, s/n, Cidade Universitária, 58051-900 João Pessoa, PB, Brazil
| | - Thaís Barreto Guedes
- Universidade Estadual do Maranhão, Programa de Pós-Graduação em Biodiversidade, Ambiente e Saúde, Centro de Estudos Superiores de Caxias, Praça Duque de Caxias, s/n, Morro do Alecrim, 65604-380 Caxias, MA, Brazil.,Gothenburg Global Biodiversity Center, Box 461, SE-405 30, Göteborg, Sweden
| | - Flávia Mol Lanna
- The Ohio state University, Department of Evolution, Ecology, and Organismal Biology, 318 W. 12th Ave, 43210, Columbus, OH, USA
| | - Daniel Cunha Passos
- Universidade Federal Rural do Semi-Árido, Laboratório de Ecologia e Comportamento Animal, Programa de Pós-Graduação em Ecologia e Conservação, Departamento de Biociências, Centro de Ciências Biológicas e da Saúde, Avenida Francisco Mota, 572, Pres. Costa e Silva, 59625-900 Mossoró, RN, Brazil
| | - Willianilson Pessoa DA Silva
- Universidade Federal da Paraíba, Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Centro de Ciências Exatas e da Natureza, Departamento de Sistemática e Ecologia, Campus I - Cidade Universitaria, s/n, Cidade Universitária, 58051-900 João Pessoa, PB, 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
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