COLLABORATIVE RESEARCH: Triassic-Jurassic Fossils and the Origin of the Crocodilian Skull

合作研究：三叠纪-侏罗纪化石和鳄鱼头骨的起源

• 批准号: 1636753
• 负责人: James Clark
• 金额: $ 27.99万
• 依托单位: George Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1636753&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Triassic; Jurassic; Fossils

Crocodilians and their closest relatives have an exceptional fossil record from the last 250 million years, documenting the origins of their many specializations. Here the PIs investigate for the first time the origins of the unique jaw-closing system that allows crocodilians to have the strongest bite force of any vertebrate, using biomechanical analyses integrated with a study of their evolutionary relationships. The PIs will also study how the size of air spaces in the skull relates to a dramatic increase in global temperatures and decrease in atmospheric oxygen at the end of the Triassic Period. The study seeks to determine whether the origin of features increasing bite force were related to the increase in air spaces in the skull, or whether these two signature adaptations of modern crocodilians evolved independently. Crocodilians are charismatic animals that lend themselves well to educational outreach, and this project will utilize the Smithsonian?s National Museum of Natural History's Q'rius learning center and University of Missouri's Inside Dinosaurs program as platforms to contribute to public scientific literacy and public engagement with science. The PIs and their students will engage in public presentations and develop interactive experiences based on 3D skulls printed from project CT scans. Collaboration with researchers in China will strengthen international collaboration.

鳄鱼及其近亲在过去的2.5亿年间有一个特殊的化石记录，记录了它们许多专业化的起源。在这里，pi首次使用生物力学分析结合它们的进化关系研究，调查了鳄鱼独特的颌合系统的起源，该系统使鳄鱼拥有任何脊椎动物中最强的咬合力。pi还将研究头骨中空气空间的大小与三叠纪末期全球气温急剧上升和大气氧气减少之间的关系。该研究试图确定咬合力增加的特征的起源是否与颅骨中空气空间的增加有关，或者这两个现代鳄鱼的特征适应是否独立进化。鳄鱼是很有魅力的动物，很适合教育推广，这个项目将利用史密森尼？美国国家自然历史博物馆的Q'rius学习中心和密苏里大学的恐龙内部项目，作为促进公众科学素养和公众参与科学的平台。pi和他们的学生将参与公开演讲，并开发基于项目CT扫描打印的3D头骨的互动体验。与中国研究人员的合作将加强国际合作。

项目成果

The effects of skull flattening on suchian jaw muscle evolution

头骨扁平化对此类颌骨肌肉进化的影响

• DOI: 10.1002/ar.24912
• 发表时间: 2022
• 期刊: The Anatomical Record
• 作者: Sellers, Kaleb C.;Nieto, Mauro Nicolas;Degrange, Federico J.;Pol, Diego;Clark, James M.;Middleton, Kevin M.;Holliday, Casey M.
• 通讯作者: Holliday, Casey M.

Braincase anatomy of Almadasuchus figarii (Archosauria, Crocodylomorpha) and a review of the cranial pneumaticity in the origins of Crocodylomorpha

Almadasuchus Figarii（始龙目，鳄形目）的脑壳解剖以及鳄形目起源中颅骨气动性的回顾

• DOI: 10.1111/joa.13171
• 发表时间: 2020
• 期刊: Journal of Anatomy
• 影响因子: 2.4
• 作者: Leardi, Juan Martín;Pol, Diego;Clark, James Matthew
• 通讯作者: Clark, James Matthew

Convergent Evolution of a Eusuchian-Type Secondary Palate within Shartegosuchidae

Shategosuchidae 内 Eusuchian 型次级上颚的趋同进化

• 发表时间: 2018
• 期刊: American Museum novitates
• 影响因子: 1.5
• 作者: Dollman, K.;Clark, J.M.;Norell, M.;Xu, X.;Choiniere, J.N.
• 通讯作者: Choiniere, J.N.

The Shishugou Fauna of the Middle‐Late Jurassic Transition Period in the Junggar Basin of Western China

• DOI: 10.1111/1755-6724.14996
• 发表时间: 2022-08
• 期刊: Acta Geologica Sinica ‐ English Edition
• 作者: Xingqian Xu;James M. Clark;D. Eberth;P. Currie

A new paralligatorid (Crocodyliformes, Neosuchia) from the mid-Cretaceous of Jilin Province, northeastern China

• DOI: 10.1016/j.cretres.2021.105018
• 发表时间: 2021-09
• 期刊: Cretaceous Research
• 影响因子: 2.1
• 作者: Paul Rummy;Xiaocong Wu;James M. Clark;Qi Zhao;Chan-zhu Jin;Masateru Shibata;Feng Jin;Xing Xu