Taxonomic revision of Chironius bicarinatus (Wied 1820) (Serpentes: Colubridae), with description of a new species


Publication type
Article
Language
English
Appears in Collections:
Metrics
Abstract
Chironius bicarinatus is a conspicuous colubrid snake species, widely distributed in northeastern, southeastern, central-western, and southern Brazil, as well as Paraguay, Argentina, and Uruguay. On the basis of new morphological data of individuals from previously unsampled regions and deoxyribonucleic acid sequences, we reviewed the taxonomy of populations previously referred to as C. bicarinatus, revisiting the species definition with an updated diagnosis, inferring its phylogenetic relationships with closely related lineages in southern Brazil, herein described as a new species restricted to Pampa forests or grasslands and Atlantic Forest semidecidual forests in southern Brazil. The new species can be readily diagnosed from C. bicarinatus and all other congeners on the basis of internal (hemipenis unilobed, unicalyculate, cylindrical, apex with smooth calyces, with spinules restricted to proximal portion, near the medial area; lacrimal foramen with small projection on the anteroventral margin) and external morphology (ventrals 153–165 [153–165 in males, 155–164 in females]; subcaudals 103–146 pairs [129–142 in males, 103–146 in females]; adult dorsal pattern with dark green background, scales sometimes with light blue margin, two conspicuous black dorsal stripes with light green vertebral stripe between them that gradually dissipates to the tail, ventrals with black margin on its edges) and molecular evidence.
Reference
Entiauspe-Neto OM, Lúcio lyra M, Koch C, Quintela FM, Abegg AD, Loebmann D. Taxonomic revision of Chironius bicarinatus (Wied 1820) (Serpentes: Colubridae), with description of a new species. Herpetological Monographs. 2020 July;34(1):98-115. doi:10.1655/HERPMONOGRAPHS-D-19-00013.1.
Link to cite this reference
https://repositorio.butantan.gov.br/handle/butantan/3135
Issue Date
2020


Files in This Item:

Existing users please Login
10.1655HERPMONOGRAPHS-D-19-00013.1.pdf
Description:
Size: 4.08 MB
Format: Adobe PDF
Embargoed until January 1, 2999    Request a copy
Show full item record

The access to the publications deposited in this repository respects the licenses from journals and publishers.