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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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internal coordinates
Internal corporate entrepreneurship/Intrapreneurship
internal correction voltage
internal correlation coefficient
internal corrosion control technology for gathering pipeline
internal corrosion direct evaluation
internal corrosion of oil and gas pipeline
internal curvature
internal cycle of soil nitrogen
internal cylindrical grinding
internal deformation in active tectonic block
internal degree of freedom
internal direct product
internal direct sum
internal diseconomic regulation
internal division
internal dosimetry
internal driving strength theory
internal ear
internal electrolysis
internal electromagnetic pulse
internal energy
internal energy theorem
internal environment
internal environment of organization
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