Additional file 2: of Systemic distribution of medullary bone in the avian skeleton: ground truthing criteria for the identification of reproductive tissues in extinct Avemetatarsalia

Table S2. Comparison of the skeletal distributions of MB and pneumaticity in different bird species. Data on the skeletal distribution of MB come from the present study and the study of Werning ([43]: appendix 2). Data on the skeletal distribution of pneumaticity have been compiled from O’Connor ([48]: table 2), and O’Connor ([51]: table 2). The presence (√) or absence (X) of MB and pneumaticity was recorded in different elements / regions of the bird skeleton. We highlighted in red skeletal elements considered as pneumatic and containing MB. (XLS 41 kb)

补充表S2. 不同鸟类骨骼中骨髓骨（MB）与骨骼充气性的分布对比。骨髓骨的骨骼分布数据源自本研究及Werning的相关研究（[43]：附录2）。骨骼充气性的分布数据汇编自O’Connor的两项研究，分别为[48]中的表2与[51]中的表2。研究记录了鸟类骨骼各不同骨骼单元/区域内骨髓骨与充气性的存在（√）与缺失（X）情况。我们将同时具备充气性特征且含有骨髓骨的骨骼元素以红色标注。（XLS格式，文件大小41 KB）