The endocast of Euparkeria sheds light on the ancestral archosaur nervous system
The endocast of Euparkeria sheds light on the ancestral archosaur nervous system
复制标题
Euparkeria 的内铸揭示了祖先祖龙神经系统
DOI:
10.1111/pala.12630
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发表时间:
2022
期刊:
影响因子:
2.6
通讯作者:
Bhullar, Bhart‐Anjan S.
中科院分区:
文献类型:
--
作者:
Fabbri, Matteo;Bhullar, Bhart‐Anjan S.
Understanding the evolution of the tetrapod brain is essential to trace the history of ecomorphological diversification of modern clades. While previous studies focused on the morphological transformation of the nervous system along the dinosaur–bird transition, little is known about the brain anatomy of archosauriformes and early archosaurs. Here, we describe the endocast ofEuparkeria capensis, a small bodied, terrestrial archosauriform closely related to Archosauria, with the goal of resolving the current uncertainties surrounding the ancestral condition of the archosaurian nervous system. The endocast ofEuparkeriais sigmoidal, with large olfactory bulbs, an expanded cerebral hemisphere and an elongated flocculus. We suggest that this pivotal taxon was an active predator with a remarkable olfactory acuity. Overall, the endocast ofEuparkeriaresembles the ones observed in phytosaurs, crocodilians and early dinosaurs, implying that modern crocodilians retain an archosaurian plesiomorphic brain morphology.
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