compound rostrum
(ARTHROPODA: Crustacea)
In balanomorph barnacles, a compartmental plate formed by fusion of rostrolaterals with rostrum or of fused rostrolaterals; see rostrum.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • compound rostrum — In cirripeds (Balanomorpha), projection formed by fusion of rostrolateral plates, forming compound compartment overlapping latera, and on which radii may develop (cf. rostrum) [Moore and McCormick, 1969]. (Subclass Cirripedia): ( ) [Anderson,… …   Crustacea glossary

  • rostrum — (1) Anteriorly projecting, unpaired, usually rigid median extension of carapace between eyes or ocular peduncles; (2) anterior beaklike projection of valve margins overhanging incisure or notch (Ostracoda); (3) unpaired anteroventral plate of… …   Crustacea glossary

  • rostrum — n.; pl. tra [L. rostrum, beak] 1. A beak or snout; see rostellum. 2. (ARTHROPODA: Chelicerata) The labrum of spiders. 3. (ARTHROPODA: Crustacea) The median pointed process at the end of the cephalothorax. a. In thoracic barnacles, a valve between …   Dictionary of invertebrate zoology

  • rostrolateral — In cirripeds, one of pair of compartment plates lying between and overlapping rostrum and laterals, having radii on both rostral and cardinal sides and tending to fuse with rostrum; See Latus (rostral), e [Moore and McCormick, 1969]. (Subclass… …   Crustacea glossary

  • rostral plate — A flat rostrum [Mauchline, 1984]. Anteriorly projecting, unpaired, movably articulated, median extension of carapace (e.g., Phyllocarida). See: rostrum, compound rostrum [Moore and McCormick, 1969]. (Subclass Phyllocarida): Anteriorly projecting …   Crustacea glossary

  • lateral — Located away from midline; pertaining to the side [Butler, T.H.]. Plate of cirriped shell between carinolateral and rostrum. (Syn. latus) [Moore and McCormick, 1969]. Referring to or toward side [Hobbs and Jass, 1988]. (Subclass Cirripedia): ( )… …   Crustacea glossary

  • crustacean — /kru stay sheuhn/, n. 1. any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, and wood lice. adj. 2. belonging or pertaining to the… …   Universalium

  • Thylacocephala — Taxobox | name = Thylacocephala fossil range = Early Cambrian Late Cretaceous regnum = Animalia phylum = Arthropoda subphylum = Crustacea? classis = Thylacocephala classis authority = Pinna, Arduini, Pesarini and Teruzzi, 1982The Thylacocephala… …   Wikipedia

  • Beak — For other uses, see Beak (disambiguation). Comparison of bird beaks, displaying different shapes adapted to different feeding methods. Not to scale. The beak, bill or rostrum is an external anatomical structure of birds which is used for eating… …   Wikipedia

  • carapace — ( ) [Baba, 2005]. Entire animal, right appendages omitted, dorsal view, based on Munida. [Baba, 2005] ( ) [Baba, 2005]. Carapace, spines, based on Munida. [Baba, 2005] Head Shield cuticular structure arising from posterior margin of cephalon,… …   Crustacea glossary

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