英语词汇“diphycercal”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

diphycercal

/ˌdɪfɪˈsəːk(ə)l

adjective Zoology

(Of a fish’s tail) approximately symmetrical and with the vertebral column continuing to the tip, as in lampreys. Contrasted with heterocercal, homocercal.The symmetrical, diphycercal tail, not perfected by gnathostomes until the Cretaceous, was standard equipment on heterostracans in the Silurian....

In Strepsodus the tail was diamond shaped and diphycercal; in Gooloogongia loomesi it was nearly so.
Sharks, and similar chondrichthyes, have heterocercal tails; the diphycercal tails are found in lungfish and their relatives; and the homocercal tail is characteristic of bony fish.

Origin

Mid 19th century: from Greek diphu- 'of double form' + kerkos 'tail' + -al.

单词	diphycercal
释义	diphycercal /ˌdɪfɪˈsəːk(ə)l / adjective Zoology (Of a fish’s tail) approximately symmetrical and with the vertebral column continuing to the tip, as in lampreys. Contrasted with heterocercal, homocercal.The symmetrical, diphycercal tail, not perfected by gnathostomes until the Cretaceous, was standard equipment on heterostracans in the Silurian.... In Strepsodus the tail was diamond shaped and diphycercal; in Gooloogongia loomesi it was nearly so. Sharks, and similar chondrichthyes, have heterocercal tails; the diphycercal tails are found in lungfish and their relatives; and the homocercal tail is characteristic of bony fish. Origin Mid 19th century: from Greek diphu- 'of double form' + kerkos 'tail' + -al.
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