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elephantiforms (fossil)
释义
elephantiforms (fossil)
Encyclopedia
理学
哺乳纲(化石)
释
elephantiforms (fossil)
象类(化石)
从现生物种来看,象类与长鼻目(Proboscidea)这两个概念是统一的,因为现生的长鼻目仅包含亚洲象和非洲象两属三种;然而考虑到种类繁多的长鼻目化石类群,如何定义象类就成为一个问题。这里采用P.塔西(P. Tassy)1988年基于分支系统学定义的象类(Elephantiformes,亚目一级),将恐象(Deinotherium)、莫湖兽(Moeritherium)、磷灰兽(Phosphatherium)、曙象(Eritherium)等类群排除在外。
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motherwort herb
moth eye effect
moth graph
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moth proof paper coated with Lead
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motility
Motility Patterns
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motional electromotive force
motional impedance
motional narrowing
motion analysis
motion and time study
motion bank
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motion capture system
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motion computing
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