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Revealing the cryptic diversity of the widespread and poorly known South American blind snake genus Amerotyphlops (Typhlopidae: Scolecophidia) through integrative taxonomy

Texto completo
Autor(es):
Graboski, Roberta ; Arredondo, Juan C. ; Grazziotin, Felipe G. ; Guerra-Fuentes, Ricardo Arturo ; Da Silva, Ariane A. A. ; Prudente, Ana L. C. ; Pinto, Roberta R. ; Rodrigues, Miguel T. ; Bonatto, Sandro L. ; Zaher, Hussam
Número total de Autores: 10
Tipo de documento: Artigo Científico
Fonte: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. N/A, p. 33-pg., 2022-11-12.
Resumo

Morphological stasis is generally associated with relative constancy in ecological pressures throughout time, producing strong stabilizing selection that retains similar shared morphology. Although climate and vegetation are commonly the main key factors driving diversity and phenotypic diversification in terrestrial vertebrates, fossorial organisms have their morphology mostly defined by their fossorial lifestyle. Among these secretive fossorial organisms, blind snakes of the South American genus Amerotyphlops are considered poorly studied when compared to other taxa. Here, we evaluate the cryptic diversity of Amerotyphlops using phylogenetic and multivariate approaches. We based our phylogenetic analysis on a molecular dataset composed of 12 gene fragments (eight nuclear and four mitochondrial) for 109 species of Typhlopidae. The multivariate analysis was implemented using 36 morphological variables for 377 specimens of Amerotyphlops. Additionally, we contrast our phylogenetic result with the morphological variation found in cranial, external and hemipenial traits. Our phylogenetic results recovered with strong support the following monophyletic groups within Amerotyphlops: (1) a clade formed by A. tasymicris and A. minuisquamus; (2) a clade composed of A. reticulatus; (3) a north-eastern Brazilian clade including A. yonenagae, A. arenensis, A. paucisquamus and A. amoipira; and (4) a clade composed of A. brongersmianus and a complex of cryptic species. Based on these results we describe four new species of Amerotyphlops from north-eastern and south-eastern Brazil, which can be distinguished from the morphologically similar species, A. brongersmianus and A. arenensis. (AU)

Processo FAPESP: 03/10335-8 - Sistemática e evolução da herpetofauna neotropical
Beneficiário:Miguel Trefaut Urbano Rodrigues
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 12/08661-3 - Genômica Comparada de Serpentes Insulares
Beneficiário:Felipe Gobbi Grazziotin
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 16/13469-5 - Desenvolvimento de Infraestrutura, ferramentas de análise e integração de dados de genômica e transcriptômica no projeto CeTICS
Beneficiário:Felipe Gobbi Grazziotin
Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
Processo FAPESP: 16/50127-5 - Dimensions US-BIOTA São Paulo: scales of biodiversity: integrated studies of snake venom evolution and function across multiple levels of diversity
Beneficiário:Inácio de Loiola Meirelles Junqueira de Azevedo
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 11/50206-9 - Origem e evolução das serpentes e a sua diversificação na região neotropical: uma abordagem multidisciplinar
Beneficiário:Hussam El Dine Zaher
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 08/52285-0 - Filogeografia de typhlops brongersmianus (serpentes: scolecophidia: typhlopidae): padroes de diversidade genetica em uma serpente fossorial.
Beneficiário:Roberta Graboski Mendes
Modalidade de apoio: Bolsas no Brasil - Mestrado