Clasp filament see dististylus

clasping apparatus (ARTHRO: Crustacea) A movable, heavily sclerotized sclerite of male ostracods, that articulates with the midportion of the peniferum in a socket near the ventral cardo and the loop of the spermatic tube; probably a tactile organ.

class n. [L. classis, division] A taxonomic group used in classification of organisms into which a phylum or division is divided, and which in turn is subdivided into orders.

classical taxonomy A taxonomic method incorporating the uses of morphological, serological, and biochemical data in classifying, describing and naming of organisms. see taxonomy.

classification n. [L. classis, division; -fic, make] The process of delimitation, ordering, and ranking taxa (populations and groups of populations) at all levels by inductive procedures.

clathrate, clathrose a. [L. clathratus, latticed] 1. Divided like latticework. 2. (MOLL: Gastropoda) Shells having orna mentation of spiral and transverse components that intersect to form a broad lattice.

clausilium, claucilium n. [L. claudere, to close] (MOLL: Gastropoda) In Clausiliidae, a calcareous closing device that effectively seals the apertural lamellation; collectively called lunellarium.

claustrum n. [L. claustrum, bar] 1. A bolt or bar. 2. (ARTHRO: Insecta) Any structure uniting wings in flight, i.e., hooks, thickened margins, or a jugum. 3. (CNID: Scyphozoa) The transverse circumferential membrane dividing the stomach pouches in some medusae.

clava n.; pl. clavae [L. clava, club] 1. Any club-shaped structure. 2. (ARTHRO: Chelicerata) The ventral mouth part of ticks. 3. (ARTHRO: Insecta) The terminal enlarged joints of the antenna; clavola.

claval furrow (ARTHRO: Insecta) A flexion line of the wings found just behind the posterior cubital vein; cubito-anal fold.

claval suture (ARTHRO: Insecta) In Hemiptera, the suture of the front wing separating the clavus from the corium.

claval vein (ARTHRO: Insecta) A vein in the clavus.

clavate a. [L. clava, club] Enlarged at the tip; club shaped.

clavicle n. [L. dim. clavis, key] (MOLL: Bivalvia) A buttress for support of the chondrophore.

clavicula n. [L. dim. clavis, key] (ARTHRO: Insecta) Coxa of an anterior leg.

clavicular lobe (ARTHRO: Insecta) In Homoptera, that portion of the hind wing behind the anal veins.

claviform a. [L. clava, club; forma, shape] Club-shaped; clavate.

clavola n. [L. dim. clava, club] (ARTHRO: Insecta) The antenna beyond the second segment; flagellum.

clavule n. [L. dim. clava, club] 1. (echinod: Echinoidea) In Spatangoida, a minute ciliated spine on the test. 2. (porif) A modified triaxonal spicule with a disk or bulb at one end.

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