First record in midwestern region of the state of São Paulo, Brazil of Typhlops brongersmianus Vanzolini, 1976 (Squamata: Typhlopidae)

Arruda, Mauricio Papa de; Almeida, Carlos Henrique Luz Nunes de; Rolim, Daniel Contieri; Maffei, Fábio

doi:10.15560/7.4.571

Cited by 4 publications

(2 citation statements)

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“…Amerotyphlops brongersmianus is a widespread species in South America (Figure ), it is found in Argentina, in Humid Chaco and Humid Pampas; Brazil, in South and North Atlantic Forest, Cerrado, Savanna enclaves in the Amazon and Caatinga; Bolivia, in Beni Savanna, Central Andean Puna, and Chiquitanos Dry Forest; Colombia, in the Amazon region and in Apure‐Villavicencio Dry Forest; Guyana, in Guyana Moist Forest; Paraguay, in Dry and Humid Chaco, and Atlantic Forest; Peru, in the Amazon forest; Suriname, in Guiana Freshwater Swamp Forest and Amazon‐Orinoco Southern Caribbean Mangroves; Trinidad, in Lesser Antillean Dry Forest; and Venezuela, in La Costa Xeric Shrublands (Arruda et al, ; Dixon & Hendricks, ; Guedes et al, ; Loebmann, ; Martins et al, ; Rodrigues, ; Santana et al, ; Wallach et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…Maps were generated through the software ArcGIS v10.2.2 (ESRI, ). Geographical coordinates were obtained from Species Link online database (http://www.splink.org.br), based on the institution database; compiled data contained in the literature (Arruda, Almeida, Rolim, & Maffei, ; Ávila & Kawashita‐Ribeiro, ; Brito & Freire, ; Caicedo‐Portilla, ; Cunha & Nascimento, ; Dixon & Hendricks, ; França, Mesquita, & Colli, ; França & Venâncio, ; França, Germano, & França, ; Freire, ; Graboski et al, ; Guedes, Nogueira, & Marques, ; Loebmann, ; Martins, Silveira, & Bruno, ; Rivas et al, ; Roberto, Ávila, & Melgarejo, ; Roberto, Oliveira, Filho, & Ávila, ; Rodrigues, ; Rodrigues & Juncá, ; Roux, ; Roze, ; Shreve, ; Wallach et al, ), or directly taken from the localities of specimens examined in collections (see Supporting information Appendix and ). We generated lists of distribution for all South American species, providing accurate maps for all of them and commenting on the geographical pattern for the genus.…”

Section: Methodsmentioning

confidence: 99%

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Molecular phylogeny and hemipenial diversity of South American species ofAmerotyphlops(Typhlopidae, Scolecophidia)

et al. 2018

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Typhlopidae is the most diverse family of Scolecophidia, with 269 species.Amerotyphlops was recently erected within subfamily Typhlopinae and comprises fifteen species distributed from Mexico to Argentina and the southern Lesser Antilles.Despite recent advances, affinities among typhlopines remain poorly explored, and the phylogenetic relationships and morphology of the South American (SA) species were never accessed before. Here, we performed a phylogenetic analysis including 106 species of Typhlopidae and ten genes. Our dataset represents the most comprehensive for SA species, containing seven of eight recognized species. Corroborating previous studies, we recovered the main groups of Typhlopoidea, and for typhlopines, we recovered with strong support two clades: (a) the Greater Antilles radiation, and the (b) Lesser Antilles and SA radiation. Within the SA radiation, we recovered four main lineages: (a) a clade formed by A. tasymicris and A. minuisquamus; (b) a clade composed by A. reticulatus as the sister group of all other SA species; (c) a clade composed by A. brongersmianus as the sister group of a clade comprising all Northeast Brazilian Species (NBS); and (d) a clade of the NBS, including A . yonenagae, A. arenensis, A. paucisquamus, and A. amoipira. We supplemented our phylogenetic result with the description of hemipenial morphology for seven SA species and comment their relevance to the systematics of Typhlopinae. Hemipenes of SA Amerotyphlops follow the general pattern in scolecophidians (single organ with undivided sulcus). Only A. reticulatus and A. minuisquamus have organs with calcified spines. According to our results, hemipenial ornamentation have shown highly informative and could represent a potential source of systematic and taxonomic characters in that group. We also present an extensive review of the geographical distribution for all SA species. Our study represents the first integrative analysis of a poorly known evolutionary radiation of one of the most widespread SA fossorial snakes. |GRABOSKI et Al.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Molecular phylogeny and hemipenial diversity of South American species ofAmerotyphlops(Typhlopidae, Scolecophidia)

et al. 2018

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

Graboski

Salgar

Grazziotin

et al. 2022

Zoological Journal of the Linnean Society

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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.

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A new species of Amerotyphlops from Northeastern Brazil, with comments on distribution of related species

Graboski

Filho

Silva

et al. 2015

Zootaxa

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We describe a new species of Amerotyphlops from an upland forest enclave in the state of Paraíba, Northeastern Brazil. The new species is distinguished from the other seven South American species of Amerotyphlops by the combination of the following characters: nasal suture incomplete; rostral scale oval and yellowish cream with some dark brown spots; four supralabial scales; three infralabial scales; rows of scales around the body 18/18/18; middorsal scales from 204 to 225; dorsum with twelve to thirteen rows of scales dark brown and belly with four to five rows of scales immaculate yellowish cream; caudal spine dark brown; subcaudal scales 8-10 in female and 11-13 in males; maximum total length 233 mm. The new species is morphologically similar to A. amoipira and A. paucisquamus, sharing 18/18/18 rows of scales around the body and a small overlap of counts of middorsal scales.

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First record in midwestern region of the state of São Paulo, Brazil of Typhlops brongersmianus Vanzolini, 1976 (Squamata: Typhlopidae)

Cited by 4 publications

References 4 publications

Molecular phylogeny and hemipenial diversity of South American species ofAmerotyphlops(Typhlopidae, Scolecophidia)

Molecular phylogeny and hemipenial diversity of South American species ofAmerotyphlops(Typhlopidae, Scolecophidia)

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

A new species of Amerotyphlops from Northeastern Brazil, with comments on distribution of related species

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