所屬欄目:英漢古生物學(xué)專業(yè)術(shù)語(yǔ)
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(gè)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(fā)生事件,其識(shí)別依據(jù)是共同衍征。 ......(本文共 184 字 ) [閱讀本文] >>