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单词 pelycosaur
释义 pelycosaur|ˈpɛlɪkəʊsɔː(r)|
Also pelycosaurian.
[f. mod.L. name of order Pelycosauria (E. D. Cope 1878, in Proc. Amer. Philos. Soc. XVII. 511), f. Gk. πέλυξ, πέλυκ- bowl, cup + σαῦρος lizard.]
A fossil reptile of the order Pelycosauria, known from Permian remains, and sometimes distinguished by bony spines developed from some of the vertebrae. Also attrib. or as adj.
1880Athenæum 6 Nov. 612/1 Mr. Cope's group of Pelycosaurians in North America.1930H. H. Swinnerton Outl. Palæont. (ed. 2) xii. 334 Dimetrodon was a typical Pelycosaurian.1933A. S. Romer Vertebr. Paleont. xi. 222 The neural arches of pelycosaurs were (as in most reptiles) narrower than those of the cotylosaurs.Ibid., The pelycosaur palate was constructed on a primitive pattern.1954W. E. Swinton Fossil Amphibians & Reptiles vi. 29 A group of very important reptiles, the Therapsida, are descended from the Dimetrodon-like Pelycosaurs.1968A. S. Romer Procession of Life xiv. 235 The central types among the therapsids were carnivores, continuing the flesh-eating tradition of the main pelycosaur stock.1973Nature 16 Mar. 203/2 Dimetrodon grandis was the end form of an evolutionary series of pelycosaurs that had tended to develop increasingly large sails.1977A. Hallam Planet Earth 212 A bizarre characteristic of a number of the pelycosaurs was the development of a huge sail-like structure adorning the back.
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