An illustrated atlas of the vertebral morphology of extant non-caenophidian snakes, with special emphasis on the cloacal and caudal portions of the column

IF 2.4 2区 生物学 Q1 ZOOLOGY
Zbigniew Szyndlar, Georgios L. Georgalis
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引用次数: 1

Abstract

Abstract We here present a thorough documentation of the vertebral morphology and intracolumnar variation across non-caenophidian snakes. Our studied sample of multiple individuals covers a large number of genera (67) and species (120), pertaining to almost all extant non-caenophidian families. Detailed figuring of multiple vertebrae across the trunk, cloacal, and caudal series for many different individuals / taxa documents the intracolumnar, intraspecific, and interspecific variation. An emphasis is given in the trunk-to-caudal transition and the pattern of the subcentral structures in that region of the column. Extant non-caenophidian snakes show an astonishing diversity of vertebral morphologies. Diagnostic vertebral features for extant families and many genera are given, though admittedly vertebral distinction among genera in certain groups remains a difficult task. A massive compilation of vertebral counts for 270 species, pertaining to 78 different genera (i.e., almost all known valid genera) and encompassing all extant non-caenophidian families, is provided based on our observations as well as an extensive literature overview. More particularly, for many taxa, detailed vertebral counts are explicitly given for the trunk, cloacal, and caudal portions of the column. Extant non-caenophidian snakes witness an extremely wide range of counts of vertebrae, ranging from 115 up to 546. A discussion on the diagnostic taxonomic utility and potential phylogenetic value of certain vertebral structures is provided. Comparisons of the subcentral structures of the cloacal and caudal vertebral series are also made with caenophidian lineages. We anticipate that this illustrative guide will set the stage for more vertebral descriptions in herpetological works but will also be of significant aid for taxonomic identifications in ophidian palaeontology and archaeozoology.
现存的非栉蛇的脊椎形态的图解图集,特别强调了柱的肛管和尾端部分
摘要:我们在这里提出了一个完整的文件的椎形态和柱内变异跨越非栉蛇。我们研究的多个体样本涵盖了大量的属(67)和种(120),几乎属于所有现存的非栉虫科。在许多不同的个体/分类群中,对横跨躯干、肛肠和尾端系列的多个椎骨的详细描绘记录了柱内、种内和种间的变异。重点是在树干到尾端过渡和亚中心结构的格局,在该地区的柱。现存的非栉蛇显示出惊人的椎体形态多样性。诊断椎体特征为现存的家庭和许多属给出,虽然不可否认的椎体区分之间的属在某些群体仍然是一项艰巨的任务。根据我们的观察和广泛的文献综述,提供了270种脊椎计数的大量汇编,属于78个不同的属(即几乎所有已知的有效属),包括所有现存的非栉水母科。更特别的是,对于许多分类群,详细的椎体计数明确地给出了柱体的主干、泄殖腔和尾端部分。现存的非嗜蛇类蛇的椎骨数量非常多,从115到546块不等。对某些椎体结构的诊断分类效用和潜在的系统发育价值进行了讨论。本研究还比较了隐脊椎骨谱系中隐脊椎骨和尾椎骨系列的次中心结构。我们期望这一说明性指南将为爬行动物工作中更多的椎体描述奠定基础,但也将对蛇类古生物学和考古学的分类鉴定有重要帮助。
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来源期刊
CiteScore
4.00
自引率
19.00%
发文量
42
审稿时长
>12 weeks
期刊介绍: Research fields covered by VERTEBRATE ZOOLOGY are ta‍xo‍no‍my, mor‍pho‍logy, an‍at‍omy, phy‍lo‍ge‍ny (mo‍le‍cu‍lar and mor‍pho‍lo‍gy-based), hi‍sto‍ri‍cal bio‍geo‍gra‍phy, and pa‍lae‍on‍to‍lo‍gy of ver‍te‍bra‍tes.
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