俄国欧洲区法门纪(上泥盆世)新齿状齿板皮动物

Q3 Agricultural and Biological Sciences

Biological Communications Pub Date : 2022-12-31 DOI:10.21638/spbu03.2022.401

A. Ivanov

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引用次数: 0

摘要

Neruchella eichwaldi gen.et sp.nov.是在俄罗斯奥廖尔地区的法门尼亚-列贝达尼亚地区阶发现的头盾的基础上建造的。这个新分类单元不同于所有已知的ptyctodontids，其特征是中央板沿着头骨中线接触，中央感觉线管汇合，以及失去了珠心板。两个法门齿龙属Neruchella和Chelyphorus的头盾结构与较老齿龙属分类群的一般颅骨模式完全不同。

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New ptyctodontid placoderm from the Famennian (Upper Devonian) of European Russia

Neruchella eichwaldi gen. et sp. nov. is erected on the basis of a head shield found in the Famennian Lebedyanian Regional Stage of the Orel Region, Russia. The new taxon differs from all known ptyctodontids, and is characterized by the central plates in contact along the skull midline, the meeting of the sensory-line canals on the centrals and the loss of the nuchal plate. The structures of the head shields of two Famennian ptyctodontids Neruchella and Chelyophorus are completely different from the general skull bone pattern of older ptyctodontid taxa.

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来源期刊

Biological Communications Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.70

自引率

0.00%

发文量