fossil species/amn

11.   They tried to identify living nautilus species in the same way that paleontologists identify fossil species, by finding distinguishing structures on their anatomy.

a. + species >>共 618 个
endangered 27.52%
new 5.82%
different 4.65%
native 3.04%
rare 2.96%
protected 2.54%
threatened 2.33%
animal 2.09%
the 1.93%
human 1.56%
fossil 0.29%
fossil + n. >>共 140 个
record 16.98%
hunter 6.13%
evidence 5.42%
hunting 4.25%
bone 4.25%
find 3.30%
species 2.59%
discovery 2.36%
remains 2.36%
dealer 1.89%
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