单词 | polypterid |
释义 | polypteridn.adj. Zoology. A. n. A fish of the African freshwater family Polypteridae, having an elongated body with hard, rhombic, ganoid scales, a dorsal fin composed of a series of spines each with a finlet attached, and primitive lungs enabling it to breathe air. ΘΚΠ the world > animals > fish > class Osteichthyes or Teleostomi > subclass Actinopterygii > [noun] > infraclass Chondrostei > family Polypteriformes or genus Polypterus > member of snake-fish1796 polypterid1890 1890 Cent. Dict. Fin-pike, a fish of the family Polypteridæ and genus Polypterus; a polypterid. 1899 Science 15 Dec. 885/1 This paper gave evidence showing that the Batrachians are probably descended from a type of fishes most nearly represented in the present fauna by the Polypterids. 1961 E. S. Herald Living Fishes of World 66/1 It is probable that one of these days the missing link between the polypterids and the paleoniscids will be discovered. 1991 A. Milne Fate of Dinosaurs (BNC) 54 Some types of air-breathing fish known as polypterids breathed air not by sucking it in through the mouth and forcing the lung-sac to expand, but by a reptilian-like movement (which is also how mammals breathe). B. adj. Of, relating to, or characteristic of the family Polypteridae. ΚΠ 1934 Webster's New Internat. Dict. Eng. Lang. at Polypterus Polypterid, n. & adj. 1981 Ann. Rev. Ecol. & Systematics 12 212 In my estimation, the problem of polypterid relationships is resolved by cladistic analysis. 1991 A. Milne Fate of Dinosaurs (BNC) 54 The key to the polypterid method of breathing is the elastic skin of interlocking scales, like body armour, which they used as a kind of diaphragm. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.adj.1890 |
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