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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 283Feeding on detritus.detritivore n. [L. detritus, worn away; vorare, to devour] Anyorganism that feeds on detritus. detritivorous a.detritus n. [L. detritus, worn away] An aggregate <strong>of</strong> fragmentarymaterial, such as decomposing parts <strong>of</strong> plants andanimals.detrorse a. [L. de, away from; versus, turn] Directed downward.see antrorse, retrorse.deuterocerebrum see deutocerebrum, mesocerebrumdeuterostome n. [Gr. deuteros, second; stoma, mouth] Truecoelomates with radial cleavage <strong>of</strong> the egg, the blastoporebecoming the anus, the coelom formed by enterocoely, includingEchinodermata, Chaetognatha, Hemicordata andChordata. see protostome.deuterotoky n. [Gr. deuteros, second; tokos, birth] Parthenogeneticreproduction in which progeny <strong>of</strong> both sexes areproduced from female gametes. see arrhenotoky, thelyotoky.deutocerebral commissure (ARTHRO) The connection betweenthe sensory neuropiles on both sides <strong>of</strong> the brain.deutocerebral region (ARTHRO) That portion <strong>of</strong> a brain dividedinto dorsal sensory and ventral motor areas.deutocerebrum n. [Gr. deuteros, second; L. cerebrum, brain](ARTHRO) The median region <strong>of</strong> a brain which receives theantennal nerves (first antennae in crustaceans, see mesocerebrum)and contains their association centers; lacking inchelicerates (scorpions, spiders and mites). deuterocerebrala.deutogyne n. [Gr. deuteros, second; gyne, woman] A female<strong>of</strong> a species which is morphologically different from theprimogyne and has no male counterpart. see protogyne.deutomalae n.pl. [Gr. deuterous, second; malon, cheek] 1.(ARTHRO: Symphyla) The second pair <strong>of</strong> mouth appendagesin certain myriapods. 2. (CHAETO) A broad plate formed bythe fusion <strong>of</strong> the second pair <strong>of</strong> mouth appendages.deutonymph n. [Gr. deuteros, second; nymphe, chrysalis](ARTHRO: Chelicerata) The second stage nymph <strong>of</strong> arach-

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