corypha n.; pl. coryphae [Gr. koryphe, top] (ARTHRO: Insecta) That region of certain scarabaeoid larvae, between the epipharynx and the clithra, sometimes bearing setae; often merged with the acropariae into a common apical region when the clithra are absent.
corysterium n. [Gr. korys, helmet] (ARTHRO: Insecta) In certain females, an abdominal glandular structure that functions in secreting the glutinous egg covering.
cosmiotaxy n. [Gr. kosmios, well ordered; taxis, arrangement] Secondary formation of recognizable and simple organs.
cosmiotrichy n. [Gr. kosmios, well ordered; thrix, hair] Setal cosmiotaxy.
cosmopolitan a. [Gr. kosmos, world; polites, citizen] Worldwide in distribution; ecumenical; pandemic.
cosmopolite n. [Gr. kosmos, world; polites, citizen] A plant or animal occurring in most parts of the world.
cosmotropical a. [Gr. kosmos, world; tropikos, of turning] Occurring throughout most of the tropics.
costa n.; pl. costae [L. costa, rib] 1. Any rib-like structure. 2. (ARTHRO: Crustacea) Any thickened portion of the peniferum of ostracods. 3. (ARTHRO: Insecta) a. The longitudinal wing vein of certain insects, forming the anterior margin of the wing. b. A dorsal, marginal part of the valva of male Lepidoptera, bearing a variety of structures and processes. 4. (BRACHIO) a. Radial ridge on the exterior surface of the shell, originating at the margin of the pro-tegulal node. b. Any coarse rib. 5. (BRYO: Gymnolaemata) One of commonly two spines fused medially and intermittently laterally, that form the costal shield of cribrimorph cheilostomate zooids. 6. (CNID) Prolongations of the septa of certain corals, that connect to the surface layer. 7. (CTENO) The row of swimming plates (ctenes) that occupy adradial positions. 8. (MOLL) The rounded ridge on the surface of a mollusk shell, greater than a chord. costal a.
costaeform a. [L. costa, rib; forma, shape] Rib-like.
costal area (ARTHRO: Insecta) That portion of a wing immediately behind the leading edge (anterior or front margin).
costal brace (ARTHRO: Insecta) The thick veinlet at the base of the wing of mayflies, that runs from the costa to the radius.
costal break (ARTHRO: Insecta) A point on the costa of a wing where the sclerotization is weak or lacking, or the vein appears to be broken.
costal cell (ARTHRO: Insecta) The space of the wing between the costa and the subcostal vein.
costal cross veins (ARTHRO: Insecta) In wings with numerous veins, those that extend between the costa and the subcosta.
costal field (ARTHRO: Insecta) That area of the fore wing of Orthoptera adjacent to the anterior margin or costa; the anterior field.
costal fold (ARTHRO: Insecta) An eversible fold in the fore wing near the costa of certain hesperioid butterflies that contains brushes of modified scales that function to disperse phero-mones.
costal hinge (ARTHRO: Insecta) The nodal furrow.
costalia see costa costal margin (ARTHRO: Insecta) The leading edge of a wing. see anal margin, apical margin.
costal membrane (ARTHRO: Insecta) In Hymenoptera, the surface of the wing in front of the costal vein.
costal nervure (ARTHRO: Insecta) The costa.
costal region (ARTHRO: Insecta) The upper area of a wing near the costa.
costal sclerite (ARTHRO: Insecta) In wings, a sclerite at the base of the costa.
costal shield (BRYO: Gymnolaemata) The discontinuous frontal shield or part of the frontal shield of cheilostomate zooids, produced by intermittently fused or unfused spines overspreading the uncalcified part of the frontal wall.
costal spines (ARTHRO: Insecta) In generalized Lepidoptera, a tuft of slightly curved spine-like setae on the costa of the hind wing near the base, that functions in holding the wings together.
costal vein (ARTHRO: Insecta) The subcosta of Lepidoptera.
costate a. [L. costa, rib] Having a longitudinal rib or ribs; having costae.
costella n.; pl. costellae [L. dim. costa, rib] 1. A small costa or rudimentary rib. 2. (MOLL: Bivalvia) A narrow, linear elevation of the shell surface.
costellate a. [L. dim. costa, rib] Bearing costellae.
costiform a. [L. costa, rib; forma, shape] Shaped like a costa or raised rib.
costoradial a. [L. costa, rib; radius, ray] (ARTHRO: Insecta) Of or pertaining to the radius and the costa of the wing.
costula n.; pl. costulae [L. dim. costa, rib] 1. (ARTHRO: In-secta) In Hymenoptera, a small ridge that separates the externo-median metathoracic area into two parts. 2. (MOLL) One of the small ridges on the shell.
costulate a. [L. dim. costa, rib] Being less prominently ribbed than costate.
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