An Unusual, Fangless Short-tailed Snake(Squamata, Serpentes, Homalopsidae) from Sumatra, Indonesia

作     者：John C.MURPHY Harold K.VORIS 

作者机构：Science and EducationField Museum 

出 版 物：《Asian Herpetological Research》 (亚洲两栖爬行动物研究（英文版）)

年 卷 期：2013年第4卷第2期

页      面：140-146页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071002[理学-动物学] 

主　　题：Brachyorrhos Calamophis Karnsophis basal homalopsids skull osteology 

摘      要：Two genera of fangless homalopsid snakes Brachyorrhos and Calamophis from eastern Indonesia have been described as basal members of the clade. A third genus belonging to this group from Sumatra, Indonesia is described here based upon morphology. Fangless homalopsid snakes share 19 dorsal scale rows at mid-body, fused dorsal scales above the cloaca, 5 to 7 upper labials, divided anal plate, divided subcaudals, 15-21 teeth on the dentary, frontal bone about 23% of skull length and other morphological characters that suggest they are related. All the three genera are known only from Indonesia. The new genus and species have a distinctive skull morphology with an absent premaxilla, a more depressed skull, and a larger eye than are present in Brachyorrhos.