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单词 pseudopupa
释义

pseudopupan.

Brit. /ˈs(j)uːdəʊˌpjuːpə/, U.S. /ˈsudoʊˌpjupə/
Inflections: Plural pseudopupae.
Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, pupa n.
Etymology: < pseudo- comb. form + pupa n.
Chiefly Entomology.
In oil and blister beetles: a larval instar which resembles a pupa in being immobile and coarctate but is followed by another (apodous) larval stage. In certain other insects (e.g. thrips, whiteflies, mealy bugs) and mites: a quiescent, non-feeding larval stage preceding the emergence of the adult. Also: an abnormal or mutant form resembling a pupa but incapable of further development.
ΚΠ
1878 C. V. Riley in Amer. Naturalist 12 215 They all [sc. blister beetles] are remarkable..for passing through seven distinct stages, viz: the egg, the first larva or triungulin, the second larva, the coarctate larva or pseudo-pupa, the third larva, the true pupa, and the imago.
1899 D. Sharp in Cambr. Nat. Hist. VI. 273 The majority delay this subsequent metamorphosis till the following spring, wintering as pseudo-pupae... The pseudo-pupa returns to a larval form.., differing little from the second instar.
1937 E. Hadorn in Proc. National Acad. Sci. U.S.A. 23 478 Since the imaginal discs have degenerated.., no pupae can be formed within the puparia. We may call such a formation a ‘pseudopupa’.
1944 R. Matheson Entomol. for Introd. Courses ix. 181 Towards autumn these nymphs [sc. of thrips] shed their skins and transform to whitish prepupae. About ten days later this is followed by another molt, disclosing what is called the pupa or pseudopupa.
1987 Developmental Biol. 119 100 Phenotypic defects associated with the six tubulin mutations include disrupted embryos, pseudopupae, [etc.].
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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