Connector neurone see association neuron

connexiva n. pl.; sing. -vum [L. connexus, join] (ARTHRO: Insecta) The lateral flanges (laterotergites or paratergites) of the abdomen, where the ventral plates are attached to the main tergal plates. see pulmonarium.

connivent a. [L. connivere, to close the eyes] Converging or coming close together; arching inward so the points meet.

conoid a. [Gr. konos, cone; eidos, form] Having the form of a cone; conoidal. see cyrtoconoid, coeloconoid.

conotheca n. [Gr. konos, cone; theke, case] (MOLL: Cephalopoda) The thin integument of a phragmocone.

conscutum n. [L. cum, together; scutum, shield] (ARTHRO: Chelicerata) The dorsal shield at the level of the anterior two pairs of legs, formed by the scutum and alloscutum united in certain ticks.

consensual a. [L. consensus, agreement] Pertaining to an involuntary action or movement correlated with a voluntary action or movement.

conservative characters Characters that change slowly during evolution.

consociation see myrmecobiosis consocies n.pl. [L. cum, with; socius, companion] 1. A portion of an association characterized by one or more of the dominants of the association. 2. A portion of an association lacking one or more of its dominant species. see associes, isocies, subsocies.

consortism n. [L. consortium, fellowship] Symbiosis in which the relationship between organisms is a fellowship. see helotism.

conspecific a. [L. cum, together; species, particular kind; fa-care, to make] Pertaining to individuals or populations belonging to the same species.

consperse a. [L. conpersus, besprinkled] Thickly and irregularly scattered with minute markings.

constant n. [L. constare, to stand firm] An invariable or fixed quantity.

constricted a. [L. constrictus, drawn together] Narrowed; compressed or drawn together at some point.

constriction n. [L. constrictus, drawn together] 1. Any constricted part or place. 2. An unspiralized region of a chromosome at metaphase.

constrictor n. [L. constrictus, drawn together] A muscle that compresses or constricts a cavity, orifice, or organ.

constrictor vulvae (NEMATA) Muscles that function to close the vulva; possibly the large sphincter of the vagina. see dilator vulvae.

consute a. [L. consuere, to sew together] Having minute stitch-like markings, differing in color from the general surface.

conterminous a. [L. cum, together; terminus, boundry] 1. Touching at the boundry, contiguous. 2. Having like bounds or limits.

contiguous a. [L. contiguus, bordering] Touching or adjoining at the edge.

continental drift The hypothetical movement of continents across the surface of the earth.

continuous variation Individuals differing from each other by small steps, often just barely discernible. see discontinuous variation.

contorted a. [L. contortus, twisted together] Twisted or straining out of shape or place.

contour n. [L. cum, with; tornare, to turn] The outline; the periphery.

contract v. [L. cum, with; trahere, to draw] To draw together; to reduce in size; to shrink. contractile a.

contractile tubules (SIPUN) Numerous, short and simple, or longer and branching tubules originating from the contractile vessel and extending into the body cavity; polian tubules.

contractile vessel(s) (SIPUN) A single or pair of tubes attached to the surface of the esophagus, anteriorly communicating with the fine vessels in the tentacles and ending blindly posteriorly; compensatory sac.

contractility n. [L. cum, together; trahere, to draw] The capability of muscle fibers to contract.

contractin n. [L. cum, together; trahere, to draw] Thought to be neurohumor that induces contraction of the chromato-phores.

contracture n. [L. cum, together; trahere, to draw] Contraction of muscles enduring after stimulus has ceased.

contralateral a. [L. contra, against; latus, side] Pertaining to, or associated with similar parts on the opposite side. see ipsilateral.

contranatant a. [L. contra, against; natare, to swim] Swimming or migrating against the current. see denatant.

conule n.; pl. conuli [L. dim. conus, cone] (PORIF) The tentlike elevation of the surface membrane. conulose a.

conus n.; pl. coni [L. conus, cone] Any cone-shaped structure.

convergence n. [L. convergere, to incline] Morphological similarity in distantly related forms; homoplasy.

convergent a. [L. convergere, to incline] 1. Tending to approach. 2. Organisms having similar characters.

convergent evolution Having similar adaptive structures among unrelated organisms due to environmental surroundings.

converse eyes Eyes in which the distal ends of retinal cells face the exterior of the cup or vesicle. see inverse eyes.

convex a. [L. convexus, arched outward] Having a curved, rounded surface, as that of an external segment of a globe. see concave.

convexity n. [L. convexus, arched outward] (MOLL: Bivalvia) The degree to which the shell is convex.

convex vein (ARTHRO: Insecta) One that tends to fold upward or follows the ridges of the wing.

convolute a. [L. convolutus, rolled up] 1. Rolled or wound upon themselves. 1. (ARTHRO: Insecta) A wing rolled around its body. 2. (MOLL) The last whorl of a shell embracing earlier ones and concealing them. see involute.

convoluted gland (ARTHRO: Insecta) In some aculeates, a part of the venom producing structures invaginated into the venom sac; in formacine ants it is external to this sac; not found in bees.

convolution n. [L. convolutus, rolled up] A coiling or twisting, as of something rolled or folded on itself.

co-ordinate a. [L. cum, together; ordo, rank] In nomenclature, of the same value.

co-ordination n. [L. cum, together; ordo, rank] The production of harmonious interaction of the various parts and processes of an organism.

copal n. [Ab.Am. copalli, a resin from tropical leguminous trees] A complex mixture of amber-like resins from various tropical trees.

coparasitism n. [L. cum, together; parasitus, one who eats at the table of another] The parasitism of a host by more than one parasite.

copepodid n. [Gr. kope, oar; pous, foot] (ARTHRO: Crustacea) Postnaupliar developmental stage of copepods, often quite similar in body form to the adult.

Cope's rule The generalization in which there is a steady increase in size in phyletic series.

coprobiont n. [Gr. kopros, dung; bios, life] A coprozoic organism; a dung living organism.

coprophagous a. [Gr. kopros, dung; phagein, to eat] Feeding upon feces; scatophagous; merdivorous. coprophagy n.

coprophilic a. [Gr. kopros, dung; philos, loving] Growing in or on dung; coprozoic.

coprozoite n. [Gr. kopros, dung; zoon, animal] A dung-inhabiting or coprozoic animal. coprozoic a.

copularium n. [L. copulare, to couple; -arium, place for] (ARTHRO: Insecta) An initial nest cell founded by the primary reproductives in the establishment of a termite colony.

copulate v.i. [L. copulare, to couple] To unite in sexual intercourse.

copulation n. [L. copulare, to couple] Pairing, coupling or joined; sexual union of male and female; to copulate.

copulation chamber (ARTHRO: Insecta) A nuptial chamber excavated by certain Scolytinae beetles in the tunnel, wherein copulation takes place.

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