cyathozooidn.
/sʌɪəθəʊˈzəʊɔɪd/ Zoology.
An abortive first stage of the embryo of certain compound ascidians, which becomes by gemmation the foundation of a colony.
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the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Molluscoidea > [noun] > division Tunicata > class Ascidiacea > member of > cyathozooid
cyathozooid1877
1877 T. H. Huxley Man. Anat. Invertebrated Animals x. 617 The result [of yelk-division] is the formation of an elongated flattened blastoderm which occupies one pole of the egg, and is converted into what I termed the cyathozooid, which is..a sort of rudimentary ascidian.
1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 446 The germinal disc in Pyrosoma developes in the posterior region into a transitory Cyathozooid.
This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2018).
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n.1877