sealsman

引用:

原帖由 gtoray 於 25-3-2009 17:36 發表
search 左一陣, 原來佢叫 tadpole shrimp
只有唔夠一寸長
http://www.tolweb.org/Branchiopoda/6243

Their external morphology has apparently not changed since the Triassic appearance of Triops cancriformis around 220 million years ago. Triops cancriformis may therefore be the "oldest living animal species on earth." [1] The members of the extinct order Kazacharthra are closely related, having been descended from notostracans.