Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

496Maggenti and Gardnermembrane.karyotin n. [Gr. karyon, nucleus] Chromatin.karyotype n. [Gr. karyon, nucleus; typos, image] The particularchromosome complement of an individual or species, asdefined by both number and morphology of the chromosomes,usually in mitotic metaphase.katabolism see catabolismkatagenesis n. [Gr. kata, down; genesis, beginning] Retrogressiveevolution.katakinesis see catakinesiskataplexy see cataplexykatatrepsis n. [Gr. kata, down; trepein, to turn] 1. (ARTHRO:Insecta) In blastokinesis, the movement of the embryo insidethe egg from one pole to another. 2. Refers to differentactivities in different groups of insects, i.e., dorsal toventral, ventral to dorsal. 3. Decrease of movement duringblastokinesis. see anatrepsis.katepimeron see infraepimeronkatepisternum see infraepisternumkatharobic a. [Gr. katharos, pure; bios, life] Pertains to livingin clean water.kation see cationKeber's valve (MOLL: Bivalvia) Pericardinal gland, connectingthe pedal and visceral hemocoels.keel n. [A.S. ceol, ship] 1. A prominent ridge or carina. 2.(BRYO) a. In Stenolaemata, a flat median portion of the zooidalwall between sinuses in recumbent part of endozoneor as a synonym of carina. b. In Phylactolaemata, a medianlongitudinal ridge along recumbent tubular colony parts. 3.(MOLL: Gastropoda) A spiral ridge usually marking a changeof slope in the outline of the shell.Keferstein bodies (SIPUN) Small oval bodies on the inner orcoelomic surface of the body wall.kenozooid n. [Gr. kenos, empty; zoon, animal; eidos, like](BRYO) 1. In Stenolaemata, a polymorph without a lophophore,gut, muscles, and orifice. 2. In Gymnolaemata, a