New Information on the Basal Pelycosaurian-Grade Synapsid Oedaleops
New Information on the Basal Pelycosaurian-Grade Synapsid Oedaleops
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关于基础盘龙类合弓纲 Oedaleops 的新信息
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
D. Berman
中科院分区：
文献类型：
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作者：
S. Sumida;V. Pelletier;D. Berman
早二叠世的Oedaleops化石通常被认为是一种基浅的盘龙类级别的联会动物。因此，它占据了一个关键的位置，了解系统发育关系的基础联会特别是和基础联会的相互关系更普遍。到目前为止，这一评估几乎完全基于新墨西哥州中北部下二叠统卡特勒组的一个头骨遗骸。额外的颅骨以及许多颅后元素的识别，至少有三个额外的个人，现在允许更完整地了解其解剖结构，并允许第一次尝试在这个基础pelycosaurian-grade synapsid的部分身体重建。Oedaleops被确认为一个非常基础的联会分类群，但除了颅后数据Oedaleops早期系统发育分析的数据矩阵意外地削弱，而不是加强，支持单系Eothyrididae的假设。
The Early Permian amniote Oedaleops is generally considered to be one of the basalmost pelycosaurian-grade synapsids. Thus it occupies a key position for understanding the phylogenetic relationships of basal synapsids specifically and basal amniote interrelationships more generally. This assessment has until now been based almost exclusively on the remains of a single skull from the Lower Permian Cutler Formation of north-central New Mexico. The identification of additional cranial as well as numerous postcranial elements of at least three additional individuals now permits a more complete understanding of its anatomy and allows the first attempt at a partial body reconstruction of this basal pelycosaurian-grade synapsid. Oedaleops is confirmed as an extremely basal synapsid taxon, but the addition of postcranial data from Oedaleops to data matrices of earlier phylogenetic analyses unexpectedly weakens, as opposed to strengthens, support for the hypotheses of a monophyletic Eothyrididae.