单词 | enteropneust |
释义 | enteropneustn.adj. Zoology. A. n. Any of various worm-like hemichordates constituting the class Enteropneusta, having an acorn-shaped proboscis, a collar, and a long trunk, inhabiting U-shaped burrows in marine sediments; an acorn worm.A characteristic anatomical feature of enteropneusts is the presence of gill slits in the pharynx (the upper part of the digestive tract). ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Hemichordata > [noun] > class Enteropneusta > member of acorn worm1876 enteropneust1895 1895 Proc. Linn. Soc. New S. Wales 1894 9 736 In the mode of formation of the proboscis pore Pt[ychodera] australiensis appears to be the most variable of all Enteropneusts hitherto described. a1933 J. A. Thomson Biol. for Everyman (1934) I. iv. 79 There are succulent, worm-like, sand-burrowing animals called Enteropneusts. 1966 Pop. Sci. Jan. 30/2 The source of the spiral tracks..is the ‘giant’ enteropneust or acorn worm. 2005 Nature 17 Mar. p. ix Enteropneusts, or acorn worms, are creatures of the deep whose relationship with vertebrates has caused considerable interest. B. adj. (attributive). Of, relating to, or characteristic of an enteropneust or the class Enteropneusta. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Hemichordata > [adjective] > of or relating to Enteropneusta enteropneustal1877 enteropneust1902 1902 Encycl. Brit. XXVIII. 145/2 A renewed investigation may show that the division is into five sacs arranged as in the Enteropneust embryo. 1937 Proc. Royal Soc. B. 122 218 The theory of the evolution of the vertebrates from some echinoderm type through some enteropneust type. 1975 Biol. Bull. 149 500 The miscellaneous classification included such minor zooplankton as enteropneust larvae, teleosts, isopods, [etc.]. 2017 T. G. Kusakabe in S. Shigeno et al. Brain Evol. by Design vii. 159 Much of the data in hemichordate molecular developmental biology have been obtained in enteropneust species. This entry has been updated (OED Third Edition, September 2018; most recently modified version published online June 2022). < n.adj.1895 |
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