泰坦巨龙类乔克里亚（合弓纲，兽头亚目）的上颌骨管。

The maxillary canal of the titanosuchid Jonkeria (Synapsida, Dinocephalia).

机构信息

Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa.

出版信息

Naturwissenschaften. 2023 Jun 5;110(4):27. doi: 10.1007/s00114-023-01853-w.

DOI:10.1007/s00114-023-01853-w

PMID:37272962

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10241669/

Abstract

The maxillary canal of the titanosuchid dinocephalian Jonkeria is described based on digitised serial sections. We highlight that its morphology is more like that of the tapinocephalid Moschognathus than that of Anteosaurus. This is unexpected given the similarities between the dentition of Jonkeria and Anteosaurus (i.e., presence of a canine) and the fact that the branching pattern of the maxillary canal in synapsids usually co-varies with dentition. Hypotheses to account for similarities between Jonkeria and Moschognathus (common ancestry, function in social signalling or underwater sensing) are discussed. It is likely that the maxillary canal carries a strong phylogenetic signal, here supporting the clade Tapinocephalia.

摘要

本文基于数字化的连续切片描述了泰坦巨龙形类恐龙约克尔龙的上颌骨管。我们强调，其形态与纤角鼻龙科的莫氏鼻角龙更为相似，而不同于 anteosauria。这与约克尔龙和 anteosaurus 的牙齿相似（即存在犬齿）以及上颌骨管在合弓类动物中的分支模式通常与牙齿共变的事实不符。本文讨论了约克尔龙与莫氏鼻角龙之间相似性的假说（共同祖先、社会信号或水下感应功能）。上颌骨管很可能携带强烈的系统发育信号，这里支持纤角鼻龙类。