synapsids
美
英 
例句
But the claim that this trait may have helped archosaurs edge out the synapsids is "highly speculative, " she said.
但是她说,认为这个特性可能使祖龙优胜于单孔类动物的说法,很大程度上只是猜测。
Before the extinction, synapsids, the ancestors to modern mammals, were the dominant group.
单孔类动物是现代哺乳类动物的祖先。在大灭绝前,它们是占统治地位的族群。