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单词 discomedusan
释义

> as lemmas

discomedusan
discomedusan n. and adj.
Brit. /ˌdɪskə(ʊ)mᵻˈdjuːz(ə)n/
,
/ˌdɪskə(ʊ)mᵻˈdjuːs(ə)n/
,
/ˌdɪskə(ʊ)mᵻˈdʒuːz(ə)n/
,
/ˌdɪskə(ʊ)mᵻˈdʒuːs(ə)n/
,
U.S. /ˌdɪskoʊməˈd(j)uz(ə)n/
,
/ˌdɪskoʊməˈd(j)us(ə)n/
[after scientific Latin Discomedusae, order name ( Haeckel Gen. Morphol. der Organismen (1866) II. p. lx)] Zoology (a) n. a jellyfish of the order or (later) subclass Discomedusae of scyphozoan cnidarians having a free-swimming, typically saucer-shaped or hemispherical medusa as the main stage in their life cycle; (b) adj. of or relating to this order or subclass.The group originally included all members of the class Scyphozoa other than the stalked jellyfishes, but these are now placed in a distinct class ( Staurozoa), as are the box jellyfishes (now class Cubozoa), and Discomedusae now comprises all remaining scyphozoans other than the crown jellyfishes (order Coronatae).
ΚΠ
1889 Cent. Dict. Discomedusan, a. pertaining to or having the characters of the Discomedusæ. n. one of the Discomedusæ.
1891 Cent. Dict. at Subgenital Situated beneath the genitalia: specifically noting certain pits or pouches of jellyfishes, as the rhizostomous or monostomous discomedusans.
1934 R. Ruedemann Paleozoic Plankton N. Amer. 28 Walcott at first tentatively considered them as the impression of the mouth and gastric cavity of a species of Medusa and later as a discomedusan form itself, flattened in the slate.
1968 W. D. Russell-Hunter Biol. Lower Invertebr. iii. 34 Most discomedusans like Aurelia have a life-cycle pattern which involves a settled polyp of a peculiar form.
2010 Biol. Bull. 219 250/2 The Discomedusae includes the order Semaeostomeae, which is now confirmed to be paraphyletic with respect to the other discomedusan order, Rhizostomeae.
extracted from disco-comb. form
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as lemmas
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