Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

236Maggenti and Gardnersimilarity 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 structuresamong unrelated organisms due to environmental surroundings.converse eyes Eyes in which the distal ends of retinal cellsface 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 upwardor follows the ridges of the wing.convolute a. [L. convolutus, rolled up] 1. Rolled or woundupon themselves. 1. (ARTHRO: Insecta) A wing rolledaround its body. 2. (MOLL) The last whorl of a shell embracingearlier ones and concealing them. see involute.convoluted gland (ARTHRO: Insecta) In some aculeates, a partof the venom producing structures invaginated into thevenom sac; in formacine ants it is external to this sac; notfound 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 productionof harmonious interaction of the various parts andprocesses of an organism.copal n. [Ab.Am. copalli, a resin from tropical leguminoustrees] A complex mixture of amber-like resins from varioustropical trees.coparasitism n. [L. cum, together; parasitus, one who eats atthe table of another] The parasitism of a host by more thanone parasite.