所屬欄目:英漢古生物學專業術語
Definition: A crown group is a group consisting of living representatives,and theirancestors,back to the most recent common ancestor of that group.冠群guān qún一個共同祖先及其所有后裔組成的單系群,即冠部類群。形成于一次分支發生事件,其識別依據是共同衍征。 ......(本文共 184 字 ) [閱讀本文] >>