Purkayastha Jayaditya, David Patrick
Help Earth, 16, RNC Path, Lachitnagar, Guwahati 781007, Assam, India.
Zootaxa. 2019 Feb 12;4555(1):79-90. doi: 10.11646/zootaxa.4555.1.6.
A new species of the family Natricidae Bonaparte is described from a single specimen obtained in Arunachal State, northeastern India. On the basis of its external morphology and of its dentition on the upper maxilla, i.e. 24 + 3 distinctly enlarged teeth separated by a short diastema, it is referred to the genus Hebius Thompson. Hebius lacrima spec. nov. is distinguished from other species of the genera Hebius, Amphiesma Duméril, Bibron Duméril and Herpetoreas Günther, by the combination of an elongate body, 19 dorsal scale rows at midbody, a distinctive broad, white band on the supralabials interrupted by a dark blotch below the eye, absence of dorsolateral stripes replaced by series of transversally elliptical or divided dorsolateral spots, a cream venter with lateral dark blotches, and scales of the first dorsal scale row entirely smooth. The interrupted, broad, lateral stripe of the head differentiates Hebius lacrima spec. nov. from all other species of the genera Hebius and Herpetoreas inhabiting the Indo-Himalayan and Indochinese Regions. This new species is compared in detail with other Asian species of Natricidae having 19 dorsal scale rows.
一种新的水游蛇科（Natricidae Bonaparte）物种是根据在印度东北部阿鲁纳恰尔邦获得的一个标本描述的。根据其外部形态和上颌齿列，即24 + 3颗明显增大的牙齿，中间有一个短间隙，它被归入腹链蛇属（Hebius Thompson）。泪斑腹链蛇（Hebius lacrima spec. nov.）与腹链蛇属、泛棱蛇属（Amphiesma Duméril）、棱鳞蛇属（Bibron Duméril）和棱鼻蛇属（Herpetoreas Günther）的其他物种不同，其特征组合包括身体细长、中段背鳞19行、上唇有一条独特的宽白带，在眼下被一个黑斑中断、没有背外侧条纹，取而代之的是一系列横向椭圆形或分开的背外侧斑点、腹部奶油色，有侧面黑斑，以及第一行背鳞完全光滑。头部中断的宽侧条纹使泪斑腹链蛇与栖息在印度 - 喜马拉雅和印度支那地区的腹链蛇属和棱鼻蛇属的所有其他物种区分开来。将这个新物种与其他具有19行背鳞的亚洲水游蛇科物种进行了详细比较。
