Limited convergence in the postcranium of aquatic crocodylomorpha

Thalattosuchia (Early Jurassic–Early Cretaceous) and Dyrosauridea (Late Cretaceous–Early Eocene) are crocodylomorph archosaurs which diversified in fluvial and marine environments and endured extinction events (i.e. Jurassic–Cretaceous boundary for Thalattosuchia; Cretaceous–Paleogene for Dyrosauridea). Their postcrania remain globally undervalued in anatomical descriptions and diagnoses, shrouding the locomotive adaptations that possibly underpinned their radiations and longevity. We thoroughly surveyed the postcranial morphology of Dyrosauridea and Thalattosuchia, recreated their girdles in three-dimensions using tens of high-precisions 3D scans, and analysed their shape using geometric morphometrics. Dyrosauridea and Thalattosuchia have clearly distinct postcrania, even when found within similar environments, suggesting the existence of clade-specific features limiting the strength of evolutionary convergence. Moreover, the range of postcranial morphologies evolved by dyrosaurids and..., This dataset contains: the supplementary information of the article 'Limited convergence in the postcranium of aquatic crocodylomorpha' all the repaired 3D models (original raw scans can be found on Morphosource) all the landmark coordinates all the R scripts to run the different analyses , R scripts require the free statistical software R 3D models are PLY and can be viewed with a variety of softwares Landmark coordinates were originally taken with Checkpoint Stratovan , # Data from: Limited convergence in the postcranium of aquatic crocodylomorpha *** ## Description of the Data and file structure Morphosource contains the original raw meshes (modeled from laser or white-light scans) The datasets uploaded on Dryad and ORBi contain: * the supplementary information of the article 'LIMITED CONVERGENCE IN THE POSTCRANIUM OF AQUATIC CROCODYLOMORPHA'; * all the repaired 3D models (original raw scans can be found on Morphosource) * all the landmark coordinates * all the R scripts to run the different analyses Detailed decription of the files: * Models.7z comprises all our repaired 3D models with their landmark coordinates and corresponding sliders.csv file used in the landmark analysis from the Code.R and Code\_LandmarkCombine\_updated.r scripts. Models.7z contains bone folders named after each bone used in our analyses: Coracoid, Femur\_outline, Humerus, Ilium, Ischium, Pubis, Scapula (***XXX***), plus a *Combined* folder. The *Combined* folder compris...海鳄亚目（Thalattosuchia，早侏罗世至早白垩世）与大头鳄超科（Dyrosauridea，晚白垩世至早始新世）均为鳄形初龙类（crocodylomorph archosaurs），它们在淡水与海洋环境中实现辐射演化，并历经了灭绝事件：海鳄亚目对应侏罗纪-白垩纪界线灭绝事件，大头鳄超科则对应白垩纪-古近纪灭绝事件。 长期以来，全球范围内针对这两类群的颅后骨骼解剖学描述与鉴定研究均较为匮乏，这使得我们对其可能支撑辐射演化与物种存续的运动适应性认知笼罩在迷雾之中。本研究全面梳理了大头鳄超科与海鳄亚目的颅后骨骼形态学特征，通过数十组高精度三维扫描数据重建了它们的肢带结构，并利用几何形态测量学（geometric morphometrics）对骨骼形态进行了量化分析。 即便生存于相似的环境中，大头鳄超科与海鳄亚目的颅后骨骼形态仍存在显著差异，这表明两类群各自存在演化支系特异性特征，限制了趋同演化的程度。此外，大头鳄类演化出的颅后骨骼形态多样性以及…… 本数据集包含以下内容： 1. 论文《水生鳄形类颅后骨骼的有限趋异演化》（*Limited convergence in the postcranium of aquatic crocodylomorpha*）的补充材料； 2. 所有经过修复的三维模型（原始扫描原始数据可于Morphosource平台获取）； 3. 所有地标坐标数据； 4. 用于执行各项分析的全部R脚本。 注：R脚本需依托免费统计软件R运行；三维模型格式为PLY，可通过多款软件查看；地标坐标数据最初通过Checkpoint Stratovan软件采集。 --- 数据来源：《水生鳄形类颅后骨骼的有限趋异演化》 ## 数据与文件结构说明 Morphosource平台收录了本研究的原始网格模型（由激光扫描或白光扫描重建）。 上传至Dryad与ORBi平台的数据集包含以下内容： 1. 论文《水生鳄形类颅后骨骼的有限趋异演化》的补充材料； 2. 所有经过修复的三维模型（原始扫描原始数据可于Morphosource平台获取）； 3. 所有地标坐标数据； 4. 用于执行各项分析的全部R脚本。 ### 文件详细说明 * `Models.7z` 压缩包包含本研究所有经过修复的三维模型、对应的地标坐标数据，以及用于地标分析的`sliders.csv`文件，该文件可通过`Code.R`与`Code_LandmarkCombine_updated.r`脚本调用。`Models.7z` 内包含以分析所用骨骼命名的骨骼文件夹：喙骨（Coracoid）、股骨轮廓（Femur_outline）、肱骨（Humerus）、髂骨（Ilium）、坐骨（Ischium）、耻骨（Pubis）、肩胛骨（Scapula，***XXX***），以及一个名为*Combined*的综合文件夹。该综合文件夹包含……（原文此处内容截断）