calyx n.; pl. -yxes, -ycis, -yces [Gr. kalyx, cup] 1. Any cuplike area into which structures are set. 2. (ARTHRO: Insecta) a. A flattened cap of neuropile in an insect brain, a component of the corpus pedunculatum. b. In certain female insects, an expansion of the oviduct into which the ovarioles open. c. In male Lepidoptera, a funnel-shaped expansion of the basal part of the vas deferens. 3. (CNID: Anthozoa) The spicules containing the basal portion of the anthocodium of some soft corals; calice. 4. (ECHINOD: Cri-noidea) The body disk that is covered with a leathery tegumen containing calcareous plates.
camarodont lantern (ECHINOD) When the large epiphyses are fused across the top of each pyramid of Aristotle's lantern.
camera n. [L. camera, chamber] (ARTHRO: Insecta) a. Curved narrow sclerite that supports the paired lobes of the arolium. b. A curved band of cuticle supporting the proximal end of a pulvillus.
cameral liquid (MOLL: Cephalopoda) A fluid found in the most recently formed nautiloid shell chambers.
cameration n. [L. camera, chamber] Divided into chambers.
camerostome n. [L. camera, chamber; stoma, mouth] (AR-THRO: Chelicerata) A ventral groove in the propodosome of Acarina, wherein lies the capitulum (gnathosoma).
campaniform a. [L. campana, bell; forma, shape] Bell or dome-shaped.
campanulate a. [L. dim. campana, bell] Formed like a bell; bell-shaped.
campestral a. [L. campester, of fields] Inhabiting open country and grassland.
campodeiform larva (ARTHRO: Insecta) A larva having the form of the thysanuran genus Campodea , elongate and flattened, with well developed legs and antennae, and usually active; said of certain active carnivorous larvae; thysa-nuriform larva; oligopod larva.
campus n.; pl. campi [L. campus, field] (ARTHRO: Insecta) The bare or almost bare ventral region of the tenth, or fused ninth and tenth, abdominal segments of scarabaeoid larvae, in front of an entire or anteriorly split teges, or in front of the paired tegilla.
Canadian Zone A biogeographical zone comprising the southern part of the great transcontinental coniferous forests of Canada, the northern parts of Maine, New Hampshire and Michigan, and a strip along the Pacific Coast extending south to Cape Mendocino and the greater part of the high mountains of the United States and Mexico. Easterly it covers the Green, Adirondack and Catskill Mountains and the higher mountains of Pennsylvania, West Virginia, Virginia, western North Carolina and eastern Tennessee; in the Rockies, extending continuously from British Columbia to western Wyoming and in the Cascades from British Columbia to southern Oregon with a narrow interruption along the Columbia River.
canal n. [L. canalis, channel] 1. A groove, tube, or duct. 2. (ARTHRO: Insecta) The groove or sulcus on the mandible or mouth structures of insect larvae. 3. (CNID) Part of the gastrovascular system; in medusae may be radial or circular with interconnections. 4. (MOLL: Gastropoda) A narrow, semitubular extension of the aperture.
canalaria a. [L. canalis, channel] (PORIF) Referring to spicules in the lining of canals.
canaliculate a. [L. dim. canalis, channel] Having longitudinal grooves, channels or sutures.
canaliculus n.; pl. -uli [L. dim. canalis, channel] 1. A minute canal. 2. (ARTHRO: Insecta) In Lepidoptera, an elongate sclerotized structure that functions as a support or guide for the aedeagus. 3. (BRYO: Stenolaemata) The large style inflecting septumlike projections into the zooecial chamber parallel to the length.
canaliferous a. [L. canalis, channel; ferre, to carry] (MOLL) Having a canal-like extension of the aperture in the form of small grooves or furrows.
canalization n. [L. canalis, channel; Gr. izein, to make] The characteristic developmental pathways that achieve a standard phenotype in spite of genetic or environmental disturbance.
canalizing selection The selection of genes to stabilize the developmental pathways so as to make the phenotype less susceptible to the effect of environmental or genetic disturbances.
canal of fecundation (ARTHRO: Insecta) The seminal canal of female Coleoptera.
canal system (PORIF) Passageways through which water passes from the surface pores to the osculum or excurrent openings.
cancellate, cancellated a. [L. cancellatus, latticed] Being marked with numerous ridges or lines; pertaining to a network formed by small interlacing bars; reticulated.
cancrisocial a. [L. cancer, crab; socius, companion] Living with or on the shell of a crab; commensalism with crabs.
cancroid a. [L. cancer, crab; Gr. eidos, like] Resembling a crab.
cane n. [L. candeo, shine, glow] (NEMATA) A refringent thick ening of the posterior cuticle void of ornamentation. see calvarium.
canella n.; pl. canellas, -ae [Gr. dim. kanna, reed] (ARTHRO: Insecta) A furrow that extends from a spiracle to the lateral margin of the body of coccoid insects.
canines n.pl. [L. canis, dog] (ARTHRO: Insecta) A pair of heavily chitinized spines originating from the mandibles of mayflies, adapted for holding food.
canities n. [L. canus, hoary] Grayness or whiteness of hair.
cannibalism n. [Sp. canibal, caribal, through Arawakan, fr. Carib calina, galibi, Caribs lit.; strong men] Eating the flesh of other individuals of the same species.
cannula n.; pl. cannulae [Gr. dim. kanna, reed] A small tube.
canthariasis n. [Gr. kantharis, blister-beetle; -iasis, a diseased condition] (ARTHRO: Insecta) The invasion of humans and other animals by coleopterous larvae.
cantharidin n. [Gr. kantharis, blister-beetle] A chemical produced by adults of the family Meloidae that causes skin blisters; the drug is obtained for medical use from the southern European Lytta vesicatoria, commonly known as Spanish fly.
cantharophilous a. [Gr. kantharis, blister-beetle; philein, to love] (ARTHRO: Insecta) Pollination by beetles.
canthus n. [Gr. kanthos, edge, corner] (ARTHRO: Insecta) A cuticular bridge across compound eyes that partially or completely divides the eyes into an upper and lower half.
capacious a. [L. capax, roomy] Able to contain a great deal; roomy; large; ample; spacious.
capacitation n. [L. capax, roomy] 1. Cause to become capable; qualify. 2. In spermatogenesis, the physiological changes between insemination and fertilization.
capillary a. [L. capillus, hair] Hair-like.
capillate a. [L. capillus, hair] Having a covering of long slender hair.
capilliform chaeta (ANN) A long, undivided dorsal hair.
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