Nonflying, diving subset of taxa (<i>F0D2</i>) based on femoral data are ranked by bone compactness (<i>Cg</i>).

Nonflying, diving subset of taxa (F0D2) based on femoral data are ranked by bone compactness (Cg).基于股骨数据的非飞行型潜水类群子集（F0D2），依据骨密实度（bone compactness，Cg）进行排序。