COLLABORATIVE RESEARCH: Triassic-Jurassic Fossils and the Origins 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: 1631684
• 负责人: Casey Holliday
• 金额: $ 18.26万
• 依托单位: University of Missouri-Columbia
• 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 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1631684&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2.5亿年中有着特殊的化石记录，记录了它们许多专业化的起源。在这里，PI首次调查了独特的下颌闭合系统的起源，该系统允许鳄鱼拥有任何脊椎动物中最强的咬合力，使用生物力学分析结合对其进化关系的研究。PI还将研究头骨中空气空间的大小如何与三叠纪末期全球温度的急剧上升和大气氧气的减少有关。该研究旨在确定增加咬合力的特征的起源是否与头骨中空气空间的增加有关，或者现代鳄鱼的这两个标志性适应是否独立进化。鳄鱼是一种有魅力的动物，非常适合教育推广，该项目将利用史密森尼国家自然历史博物馆的Q'rius学习中心和密苏里州大学的Inside Dinosaurs计划作为平台，为公众科学素养和公众参与科学做出贡献。PI和他们的学生将参与公开演讲，并根据项目CT扫描打印的3D头骨开发互动体验。与中国研究人员的合作将加强国际合作。

项目成果

Palatal Biomechanics and Its Significance for Cranial Kinesis in Tyrannosaurus rex

• DOI: 10.1002/ar.24219
• 发表时间: 2019-07-18
• 期刊: ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
• 影响因子: 2
• 作者: Cost, Ian N.;Middleton, Kevin M.;Holliday, Casey M.
• 通讯作者: Holliday, Casey M.

The significance of enamel thickness in the teeth of Alligator mississippiensis and its diversity among crocodyliforms

密西西比短吻鳄牙齿牙釉质厚度的意义及其在鳄鱼类动物中的多样性

• DOI: 10.1111/jzo.12707
• 发表时间: 2019
• 期刊: Journal of Zoology
• 影响因子: 2
• 作者: Sellers, K. C.;Schmiegelow, A. B.;Holliday, C. M.
• 通讯作者: Holliday, C. M.

2D and 3D visualizations of archosaur jaw muscle mechanics, ontogeny and phylogeny using ternary diagrams and 3D modeling

• DOI: 10.1242/jeb.243216
• 发表时间: 2022-03-01
• 期刊: JOURNAL OF EXPERIMENTAL BIOLOGY
• 影响因子: 2.8
• 作者: Cost, Ian N.;Sellers, Kaleb C.;Holliday, Casey M.
• 通讯作者: Holliday, Casey M.

Anatomy and Ontogeny of the Mandibular Symphysis in Alligator mississippiensis

密西西比鳄下颌联合的解剖学和个体发育

• DOI: 10.1002/ar.24116
• 发表时间: 2019
• 期刊: The Anatomical Record
• 作者: Lessner, Emily J.;Gant, Cortaiga A.;Hieronymus, Tobin L.;Vickaryous, Matthew K.;Holliday, Casey M.
• 通讯作者: Holliday, Casey M.

Ontogeny of bite force in a validated biomechanical model of the American alligator

经验证的美洲短吻鳄生物力学模型中咬合力的个体发育

• DOI: 10.1242/jeb.156281
• 发表时间: 2017
• 期刊: The Journal of Experimental Biology
• 作者: Sellers, Kaleb C.;Middleton, Kevin M.;Davis, Julian L.;Holliday, Casey M.
• 通讯作者: Holliday, Casey M.