洲际动物迁徙的时间:比利时多尔马勒最早始新世(MP 7)的安吉马形蜥蜴

IF 3 2区 生物学 Q1 ZOOLOGY
Andrej Čerňanský, Richard Smith, Thierry Smith, Annelise Folie
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引用次数: 0

摘要

在此,我们报告了比利时多尔马勒(Dormaal)最早始新世(MP 7)的guimorph蜥蜴,该时期是过去6600万年全球气候最温暖的时期。在这个地点可以发现几个支系:其中包括:石龙科(Glyptosauridae)、瓦拉纳科(Varanidae)和古瓦拉纳科(Palaeovaranidae)。我们的研究主要集中于以前在该地点发现的石龙类标本,其中一些标本被暂时描述为一个新物种,即Placosaurus ragei,还有一些标本被归类为一种未命名的类似于Placosauriops的 "黑色龙类"。我们的研究提供了新材料的数据,包括一个几乎完整的石龙类正面,这使我们能够将以前描述的大部分材料归为一个属和种。被归为 "黑龙 "和 "狂暴龙 "的标本与美国怀俄明州最早始新世的一种石龙类--高提亚(Gaultia)有着相同的非形态特征(扁平的骨膜和楔形的骨膜)。多尔马勒的材料是该属在北美洲以外的首次记录。事实上,在多马尔出现 "美兰龙科 "的唯一潜在证据可能是这里描述的一个孤立的脊椎骨。在这里,我们还描述了以前未绘制过的来自多玛尔的萨尼瓦类和古瓦龙类的材料。以前报告的 helodermatids 的存在无法在这个比利时地点得到证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Timing of intercontinental faunal migrations: Anguimorph lizards from the earliest Eocene (MP 7) of Dormaal, Belgium
Here we report on anguimorph lizards from the earliest Eocene (MP 7) of the Dormaal locality in Belgium, from the time of the warmest global climate of the past 66 million years. Several clades can be identified in this site: Glyptosauridae, Varanidae, and Palaeovaranidae. Our study focuses on glyptosaurid specimens previously reported from the site, some of which had been provisionally described as a new species,?Placosaurus ragei, and some assigned to an unnamed Placosauriops-like ‘melanosaurine’. Our study presents data on new material, including an almost complete glyptosaurine frontal that has enabled us to assign much of the previously described material to a single genus and species. The specimens that had been assigned to both ?P ragei and the ‘melanosaurine’ share apomorphies (flat osteoderms and chevron-shaped osteoderms) with Gaultia, a glyptosaurid previously known from the earliest Eocene of Wyoming, USA. The Dormaal material represents the first record of this genus outside North America. In fact, the only potential evidence of the occurrence of ‘Melanosaurinae’ in Dormaal might be a single isolated vertebra described here. Here we also describe previously unfigured material of Saniwa and palaeovaranids from Dormaal. The presence of previously reported helodermatids cannot be supported in this Belgian site.
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来源期刊
CiteScore
6.50
自引率
10.70%
发文量
116
审稿时长
6-12 weeks
期刊介绍: The Zoological Journal of the Linnean Society publishes papers on systematic and evolutionary zoology and comparative, functional and other studies where relevant to these areas. Studies of extinct as well as living animals are included. Reviews are also published; these may be invited by the Editorial Board, but uninvited reviews may also be considered. The Zoological Journal also has a wide circulation amongst zoologists and although narrowly specialized papers are not excluded, potential authors should bear that readership in mind.
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