The monophyly of Euparkeriidae (Reptilia: Archosauriformes) and the origins of Archosauria: a revision of Dorosuchus neoetus from the Mid‐Triassic of Russia

The monophyly of Euparkeriidae (Reptilia: Archosauriformes) and the origins of Archosauria: a revision of Dorosuchus neoetus from the Mid‐Triassic of Russia
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真蜥蜴科(爬虫类:主龙形目)的单系和主龙亚目的起源:来自俄罗斯三叠纪中期的 Dorosuchus neoetus 的修订版

DOI:
10.1111/pala.12110
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发表时间:
2014
期刊:
影响因子:
2.6
通讯作者:
Butler RJ
Butler RJ
中科院分区:
地球科学2区
文献类型:
--
作者:
Sookias RB;Sennikov AG;Gower DJ;Butler RJ

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在许多分支系统发育中,Euparkeria capensisis 被认为是主龙亚目的姐妹分类单元,并提供了一个可能近似于祖先主龙形态的关键外类群。其他几个分类单元已被归入 Euparkeriidae 科,但该分类单元的单系性仍然值得怀疑,并且很大程度上未经测试。为了测试这种单系性,根据最近关于干主龙进化的研究,对来自俄罗斯三叠世中期的主龙形和假定的真主龙类 Dorosuchus neoetus 进行了重新检查。新主龙具有许多与主龙类接近的形态特征,包括具有明显的股骨附着区域的乙状股骨。 尾股肌肉组织,但没有明确的主龙亚型。Dorosuchus neoetusis 首次被纳入数值分支分析中,并作为主龙亚目 + 植龙亚目的唯一姐妹分类单元被恢复。单系 Euparkeriidae 包括 D. 新胚胎和E. capensisis 稍微不那么节俭。此外,还有以前提到的下颌骨和翼状骨D。 在该物种的原始描述之后的neoetus也被单独包含在系统发育分析中,并在主龙目中恢复,这可能会引发对其正确分类学参考的疑问。然而,这种系统发育位置主要基于腭齿的缺失,但腭齿的存在或缺失在主龙形目中表现出相当大的同质性。基于其形态的其他方面,我们不拒绝将这些元素转介给D。 新胚胎。
Euparkeria capensisis resolved as the sister taxon to Archosauria in many cladistic phylogenies and provides a key outgroup which may approximate the ancestral archosaur morphology. Several other taxa have been referred to the family Euparkeriidae, but the monophyly of this taxon remains doubtful and largely untested. To test this monophyly, the archosauriform and putative euparkeriidDorosuchus neoetusfrom the Mid‐Triassic of Russia is re‐examined in the light of recent work on the evolution of stem archosaurs.Dorosuchus neoetusis found to possess a number of morphological features that place it close to Archosauria, including a sigmoidal femur with a clear attachment region for the m. caudifemoralis musculature, but no unambiguous archosaurian apomorphies.Dorosuchus neoetusis included for the first time in a numerical cladistic analysis and is recovered as the sole sister taxon to Archosauria + Phytosauria. A monophyletic Euparkeriidae includingD. neoetusandE. capensisis slightly less parsimonious. In addition, a mandible and pterygoid that were previously referred toD. neoetussubsequent to the original description of the species are also included separately within the phylogenetic analysis and are recovered within Archosauria, possibly raising questions as to their correct taxonomic referral. However, this phylogenetic placement is based primarily on the absence of palatal teeth, but the presence or absence of palatal teeth exhibits considerable homoplasy within Archosauriformes. Based on other aspects of their morphology, we do not reject the referral of these elements toD. neoetus.
DOI: --
发表时间: 1972
期刊:
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