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单词 gastrotricha
释义

Gastrotrichan.

Brit. /ˌɡastrə(ʊ)ˈtrʌɪkə/, U.S. /ˌɡæstrəˈtraɪkə/
Origin: A borrowing from Latin. Etymon: Latin Gastrotricha.
Etymology: < scientific Latin Gastrotricha ( E. Mečnikow 1865 , in Zeitschrift f. wissenschaftliche Zoologie 15 458) < gastro- gastro- comb. form + < ancient Greek τριχ- , θρίξ hair (see tricho- comb. form1) + scientific Latin -a -a suffix2.
Zoology.
With plural agreement: a small phylum of minute aquatic invertebrates having a short worm-like body bearing cilia, bristles, and posterior adhesive organs; (also) animals of this phylum (collectively or individually).The Gastrotricha are thought to be related to rotifers and nematodes, and they were formerly regarded as a class of the phylum Aschelminthes.
ΚΠ
1866 tr. E. Mecznikow in Q. Jrnl. Microsc. Sci. 6 248 The arrangement of the Gastrotricha consists at present of six genera.
1889 Amer. Naturalist 23 912 Carl Zelinka, of Gratz, has recently monographed the Gastrotricha of the world.
1937 W. C. Allee & K. P. Schmidt Hesse's Ecol. Animal Geogr. iii. 26 Fresh-water fishes, protozoans (especially ciliates), rotifers, and Gastrotricha have found the fresh-water environment favorable.
1953 H. Mellanby Animal Life in Fresh Water (ed. 5) xiii. 269 The Gastrotricha or ‘hairy-backs’—These animals resemble the ciliated Protozoa in superficial appearance and habits.
1979 Science 20 July 302/1 The Gastrotricha are a phylum of microscopic animals, traditionally included in the invertebrate assemblage known as ‘aschelminths’.
1995 C. Nielsen Animal Evol. x. 85 In the Gastrotricha, the monociliate condition occurs scattered within a number of families and genera.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
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n.1866
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