Appendix

Results of correlation tests between cursoriality index and body size, and between cursoriality index and bipedality index after the effect of body size was removed, among Triassic archosaurs. The default settings of the correlation tests were (1) a branch length of one set for all branches and (2) reconstructed phylogenetic relationships among Triassic archosaurs (Fig. 2). Additional sensitivity analyses with arbitrary branch length (Grafen, Nee, and Pagel), temporal duration as branch lengths, or polytomic relationship (Fig. 2B) did not alter the result significantly. The analysis was also conducted with restricted taxa, which are crurotarsans, ornithodirans, and ornithodirans without sauropodomorphs except Eoraptor.

本研究针对三叠纪主龙类（Triassic archosaurs）开展两项相关性检验：其一为奔跑能力指数（cursoriality index）与体型的相关性，其二为控制体型效应后奔跑能力指数与两足性指数（bipedality index）的相关性。本次相关性检验的默认设置为：(1) 所有分支的分支长度均设为1；(2) 采用已重建的三叠纪主龙类系统发育关系（图2）。后续采用任意分支长度（Grafen、Nee与Pagel法）、以时间持续时长作为分支长度，或多歧分支关系（图2B）开展的敏感性分析均未对结果产生显著改变。本研究还针对限定类群开展了分析，限定类群包括踝组类（crurotarsans）、鸟颈类主龙（ornithodirans），以及除始盗龙（Eoraptor）外不含蜥脚形亚目（sauropodomorphs）的鸟颈类主龙。