| 单词 | ray-fin |
| 释义 | > as lemmasray-fin ray-fin n. Zoology and Palaeontology a fish belonging to the class Actinopterygii, to which most living bony fishes belong and which includes those having thin fins supported by slender dermal rays; an actinopterygian fish. ΘΚΠ the world > animals > fish > class Osteichthyes or Teleostomi > subclass Actinopterygii > [noun] > member of New York shiner1814 acanthopterygian1835 actinopterygian1897 ray-fin1945 1945 A. S. Romer Vertebr. Paleontol. (ed. 2) v. 89 Most of the more characteristic Paleozoic ray-fins were once assigned to Palaeoniscus. 1978 Sci. Amer. Sept. 111/1 Two major types of jawed fishes were the ray fins and the lobe fins. The great majority of living fishes have descended from the ray fins. 1997 Copeia No. 1. 245/2 The actinoptergyian Cheirolepis canadensis..is one of the oldest, and most primitive, of the ray-fins known from complete skeletons. < as lemmas |
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