单词 | plesiomorphy |
释义 | ple·si·o·mor·phy (plēsē-ə-môr′fē, plēzē-) n. pl. ple·si·o·mor·phies An evolved character or trait that is shared by some or all members of a phylogenetic group and their common ancestor but is not unique to that group. A segmented spinal column is a plesiomorphy of mammals, being present as well in other groups such as fishes, reptiles, amphibians, and birds. [Greek plēsios, near to; see pel-5 in the Appendix of Indo-European roots + -MORPHY.] plesi·o·mor′phic adj. |
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