一种来自巴西塞拉多的新鹦鹉蛇物种（蛇目：游蛇科）。

A new species of parrot snake, (Serpentes: Colubridae) from the Brazilian Cerrado.

作者信息

Albuquerque Nelson R, Martins Roullien H, Carvalho Priscila S, Shepard Donald B, Santana Diego J

机构信息

Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.

Department of Biological Sciences, University of Arkansas at Fayetteville, Fayetteville, AR, United States.

出版信息

PeerJ. 2025 Jan 30;13:e18528. doi: 10.7717/peerj.18528. eCollection 2025.

DOI:10.7717/peerj.18528

PMID:39897499

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11787803/

Abstract

We describe a new species of (parrot snake) from the Cerrado ecoregion of Brazil. The new species, . sp. nov., differs from all other congeners in the following unique character combination: two Spectrum Green (129) to Light Parrot Green (133) dorsolateral stripes separated by a Buff (5) vertebral stripe, usually continuous onto the tail; loreal scale absent; postocular stripe Jet Black (300), wide and long (up 11 scales long onto nuchal region); maxillary teeth 21-25; ventrals 158-173; subcaudals 141-164; black spots on head absent; supracephalic plates of head not edged with black pigment; adult color pattern lacking dark oblique bands; keels absent on first dorsal scale rows; hemipenis unilobed, noncapitate, with undivided sulcus spermaticus, and first row of hemipenial body with four spines. Phylogenetic analysis of 16S mtDNA sequences indicate the new species is the sister taxon of , a species occurring in the neighboring Caatinga ecoregion.

摘要

我们描述了一种来自巴西塞拉多生态区的新鹦鹉蛇物种。这个新物种，即[具体物种名] sp. nov.，在以下独特的特征组合上与所有其他同属物种不同：两条从光谱绿（129）到浅鹦鹉绿（133）的背外侧条纹，被一条浅黄色（5）的脊椎条纹隔开，通常延续到尾部；无眶下鳞；眼后条纹为墨黑色（300），宽且长（在颈部区域长达11枚鳞片）；上颌齿21 - 25枚；腹鳞158 - 173枚；尾下鳞141 - 164枚；头部无黑斑；头部的顶鳞不带有黑色色素边缘；成年个体的体色模式中没有深色斜纹；第一排背鳞无棱；半阴茎单叶，无头部，有未分开的精沟，半阴茎体的第一排有四根刺。对16S线粒体DNA序列的系统发育分析表明，这个新物种是[另一物种名]的姐妹分类单元，[另一物种名]是一种出现在相邻卡廷加生态区的物种。