Limuloidea Lim`u*loi"de*a (l[i^]m`[-u]*loi"d[-e]*[.a]), n. pl. [NL. See {Limulus}, and {-oid}.] (Zo["o]l.) An order of Merostomata, including among living animals the genus {Limulus}, with various allied fossil genera, mostly of the Carboniferous period. Called also {{Xiphosura}}. [1913 Webster]

Note: There are six pairs of leglike organs, surrounding the mouth, most of which terminate in claws; those of the first pair (probably mandibles) are the smallest; the others have the basal joints thickened and spinose, to serve as jaws, while the terminal joints serve as legs. This group is intermediate, in some characteristics, between crustaceans and certain arachnids (scorpions), but the respiration is by means of lamellate gills borne upon the five posterior abdominal appendages, which are flat and united in pairs by their inner edges, and are protected by the lidlike anterior pair, which also bear the genital orifices. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


Look at other dictionaries:

  • Xiphosura — Temporal range: Silurian–Recent …   Wikipedia

  • Xiphosura — Xiph o*su ra, n. pl. See {Xiphura}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Xiphosūra — Xiphosūra, s. Pfeilschwänze …   Meyers Großes Konversations-Lexikon

  • Xiphosura —   [griechisch, zu xíphos »Schwert«], die Pfeilschwanzkrebse …   Universal-Lexikon

  • Xiphosura — Xiphosura, Pfeilschwänze ⇒ Merostomata …   Deutsch wörterbuch der biologie

  • Xiphosura — Xiphosura …   Wikipédia en Français

  • Xiphosura — ? Мечехвосты Limulus polyphemus Научная классификация Царство: Животные Тип: Членистоногие Подтип …   Википедия

  • Xiphosura —   Xifosuros Limulus polyphemus …   Wikipedia Español

  • Xiphosura — noun horseshoe crabs and extinct forms • Syn: ↑order Xiphosura • Hypernyms: ↑animal order • Member Holonyms: ↑Merostomata, ↑class Merostomata • Member Meronyms: ↑ …   Useful english dictionary

  • Xiphosura — Xiphura Xi*phu ra, n. pl. [NL., from Gr. xi fos sword + ? tail.] (Zo[ o]l.) Same as {Limuloidea}. Called also {Xiphosura}. [1913 Webster] …   The Collaborative International Dictionary of English

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