单词 | symplesiomorphy |
释义 | BETA Examples ofsymplesiomorphyDictionary> Examples ofsymplesiomorphy symplesiomorphyisn’t in the Cambridge Dictionary yet. You can help! Add a definition Their similarity to other ground-dwelling birds such as partridges and megapodes is a result of convergence andsymplesiomorphyrather than shared evolutionary innovations. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When two or more taxa that are not nested within each other share a plesiomorphy, it is asymplesiomorphy(from "syn-", together). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Later it was realized that the common ancestors of all spiders had these features (a state known assymplesiomorphy). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, the prominent discipline of cladistics uses terms such assymplesiomorphyand synapomorphy for particular aspects of basal and derived attributes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, unlike shared innovations (or "synapomorphies"), the common retention of archaisms (or "symplesiomorphy") is not necessarily considered evidence of a period of common isolated development. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The concept of thesymplesiomorphyshows the danger of grouping species together purely on the basis of morphologic or genetic similarity without distinguishing primitive from derived traits. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A commonly cited reason is that distances are inherently phenetic rather than phylogenetic, in that they do not distinguish between ancestral similarity (symplesiomorphy) and derived similarity (synapomorphy). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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