cormus n. [Gr. kormos, trunk of a tree] 1. The body, colony, or polypary of a compound animal. 2. (ARTHRO: Crustacea) see thorax.
cornea n.; pl. -neas [L. corneus, of horn] The transparent cuticle covering the ommatidia of a compound eye. corneal a.
corneagen cells The epidermal cells that produce the cornea, and later produce the corneal pigment cells.
corneagen layer That part of the epidermis extending beneath the cornea, normally consisting of two cells in each om-matidium; when absent, the cornea is secreted by the crystalline cone cells. see cornea.
corneal facet One of the lenses of modified cuticle covering an ommatidium or the array of lenses that gives a compound eye its faceted appearance.
corneal lens (ARTHRO: Insecta) The modified cuticle covering the ocellus.
corneal pigment cells (arthro) The two corneal cells that envelop each crystalline cone of a compound eye; in the developing eye, distal to the cone they secrete the corneal lense; also called primary pigment cells, corneagenous pigment cells and primary iris cells. see retinular pigment cell, accessory pigment cell.
cornein n. [L. corneus, of horn] (CNID) The organic basis of corals.
corneous a. [L. corneus, of horn] Resembling horn; of hornlike texture; corniform.
cornicle n. [L. dim. cornu, horn] (ARTHRO: Insecta) In aphids, one of a pair of movable, flap covered, pre-caudal tubes projecting from the dorsum of segment 6, that expells lipid-filled cells; thought to be a defense mechanism.
corniculate a. [L. dim. cornu, horn] Having horns or small horn-like structures.
corniculum n.; pl. -ula [L. dim. cornu, horn] (ARTHRO: Insecta) A small horn-like process of the cuticula of larvae, often present on the suranal plate.
corniculus n.; pl. -uli [L. dim. cornu, horn] 1. (ARTHRO: Cheli-cerata) In some mites, a horn-shaped infracapitular seta on the malapophysis. 2. (ARTHRO: Insecta) In Orthoptera, refers to the hardened tips of the dorsal and ventral valves of the ovipositer, used to dig holes in the ground for the deposition of eggs. see urogomphi.
cornification n. [L. dim. cornu, horn; facere, to make] Formation of horn or horn-like material; keratinization.
corniform a. [L. cornu, horn; forma, shape] A long mucronate or pointed process similar to the horn of an ox.
cornu n.; pl. cornua [L. cornu, horn] 1. A horn or horn-shaped structure. 2. (ARTHRO: Insecta) The horn-like processes in the cephalo-pharyngeal skeleton of dipterous larvae. cornual a.
cornuti n.pl.; sing. cornutus [L. cornutus, horned] (ARTHRO: Insecta) Sclerotized armature of the aedeagus of male Le-podoptera, in the form of slender single spines, scale-like dentations, dense spine-hairs or rasplike teeth; sometimes breaking off during copulation and remaining in the bursa copulatrix of the female.
corona n. [L. corona, crown] 1. A crownlike structure or organ of various invertebrates. 2. (ARTHRO: Insecta) In Lepidop-tera male genitalia, a specialized row of armament setae, teeth or spines on the cucullus. 3. (ECHINOD) a. In Cri-noidea, a central mass and arms: a crown. b. In Echin-oidea, a test, minus the apical system. 4. (rotif) A main ciliary wreath surrounding the mouth of a rotifer. coronal a.
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