Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 433homorhabdic.heterosis n. [Gr. heteros, different; -sis, process of] Selectivesuperiority of heterozygotes; hybrid vigor.heterosomal a. [Gr. heteros, different; soma, body] Chromosomalstructural changes involving two or more nonhomologouschromosomes.heterosome n. [Gr. heteros, different; soma, body] Sex chromosome;a heterochromosome.heterostrophic a. [Gr. heteros, different; strophe, turn](MOLL: Gastropoda) Pertaining to a protoconch when thewhorls appear to be coiled in the opposite direction tothose of the teloconch.heterosyllid see epitokyheterotaxis n. [Gr. heteros, different; taxis, arrangement] Abnormalarrangement of parts or organs.heterotopy n. [Gr. heteros, different; topos, place] Phyleticchange in the location from which an organ differentiates inontogeny. heterotropic a.heterotrichous anisorhiza (CNID) A nematocyst open at thetip with a slightly swollen base, with spines on the wholethread, but those at the base are larger.heterotroph n. [Gr. heteros, different; trophe, nourishment]An organism requiring organic compounds among the foodsubstances as its source of carbon; organotroph; sometimesused as synonymous with chemoheterotroph. heterotrophica. see autotrophic.heterotrophic parasitoid (ARTHRO: Insecta) In Hymenoptera,a species in Adelinidae in which the male is a parasitoid ofa different host species than the female. see diaphagousparasitoid, heteronomous hyperparasitoid.heterotropic a. [Gr. heteros, different; tropos, turn] Sexchromosome that does not have an exactly homologouspartner (xx-xy or xx-xo).heterotypic a. [Gr. heteros, different; typos, shape] Pertainingto the first meiotic division (meiosis) in which the bivalentchromosomes separate and are reduced in number. seehomeotypic.