博硕论文

Postcranial Morphology and the Locomotor Adaptations of Extant and Extinct Crocodylomorphs and Lepidosaurs 收藏

颅后形态学和现存和绝种的鳄形和鳞翅类的运动适应性

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学校

East Tennessee State University(东田纳西州立大学)

作者

Rooney, Laura

关键词

Lepidosaur; Crocodylomorph; Locomotion; Crocodilian

关键词译文

鳞翅目；鳄形;运动；鳄鱼

来源信息

East Tennessee State University，学位：M.Sc，导师：Samuels, Josh; Schubert, Blaine; Widga, Chris, 2018年, 59页

摘要

I have collected a series of linear measurements of the postcranial skeletons of 43 extant crocodylian and lepidosaur taxa to determine if those engaging in similar locomotor behavior display similar morphology despite phylogenetic differences. Stepwise discriminant function analyses reveal reptile locomotor mode can be accurately predicted (over 80% correct) based on morphology. Semi-aquatic taxa are distinguished by a longer ischium relative to pubis length, a longer scapula relative to humerus length, and a broader acetabulum than terrestrial and arboreal taxa. Arboreal taxa display a more elongate, gracile humerus and a smaller acetabulum. This morphometric data can potentially be used to predict the locomotor behavior of a wide range of extinct reptile taxa. Within this study, Hyposaurus rogersii, Necrosuchus ionensis, Alligator sp. of the Gray Fossil Site, Crocodylus affinis, and Allognathosuchus mooki were examined and all were inferred to be semi-aquatic by the discriminant function analysis.

摘要译文

我收集了43种现存的鳄类和鳞翅类类群的颅后骨骼的一系列线性测量值，以确定尽管有系统发育差异，但从事相似运动行为的人是否表现出相似的形态。通过逐步判别函数分析，可以根据形态准确地预测爬行动物的运动模式（正确率超过80％）。半水生类群的特征是，坐骨相对于耻骨的长度更长，肩cap骨相对于肱骨的长度更长，髋臼的宽度比陆生和乔木类群都大。树木类群显示出更细长的肱骨和较小的髋臼。该形态计量学数据可潜在地用于预测各种灭绝爬行动物类群的运动行为。在这项研究中，罗氏猪短螺旋藻，Necrosuchus ionensis，扬子鳄sp。对灰色化石遗址，鳄鳄和异形藻进行了检查，并通过判别函数分析将其推断为半水生。

Rooney, Laura. Postcranial Morphology and the Locomotor Adaptations of Extant and Extinct Crocodylomorphs and Lepidosaurs[D]. US: East Tennessee State University, 2018