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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> 919trophamnion n. [Gr. trophe, food; amnion, membrane aroundthe fetus] (ARTHRO: Insecta) An envelope surrounding theembryonic mass in the polyembryonic ova <strong>of</strong> mainly parasiticHymenoptera, formed by cytoplasm in the egg associatedwith the paranuclear mass, and functioning in relayingnutrients from the host.trophi n.pl.; sing. trophus [Gr. trophe, food] 1. (ARTHRO) Themouth parts, especially <strong>of</strong> insects and barnacles, collectively.2. (ROTIF) The mastacatory apparatus <strong>of</strong> themastax. trophal , trophic a.trophic chord (ARTHRO: Insecta) In telotrophic ovarioles, slenderchords connecting the nurse cells to the eggs.trophic egg (ARTHRO: Insecta) In Apis, an egg that is fed tothe colony members, usually degenerate and nonviable.trophic sac/pouch (ARTHRO: Insecta) In Siphunculata (Anoplura),a pouch opening <strong>of</strong>f the cibarium housing threeclosely compressed stylets, with only the anterior end exposed,functioning in piercing the skin for blood meals.trophic symbiosis A form <strong>of</strong> symbiosis between a social insectand another organism; tended by the social insect for thesake <strong>of</strong> the food or secretions they derive from them. seetrophallaxis, trophobiont.trophidium n. [Gr. dim. trophe, food] (ARTHRO: Insecta) InHymenoptera, the first larval stage <strong>of</strong> some Formicidae.trophobiont n. [Gr. dim. trophe, food; bios, life; ont, one who](ARTHRO: Insecta) An organism living in a social speciesnest, or cared for and protected by a social species in returnfor secretions which are then consumed. see mutualism.trophobiosis n. [Gr. trophe, food; biosis, manner <strong>of</strong> life] Aform <strong>of</strong> symbiosis in which there is a mutual exchange <strong>of</strong>food; trophallaxis. trophobiotic a. see trophic symbiosis.trophocytes n.pl. [Gr. trophe, food; kytos, container] 1. Cellsthat provide nutritive material. 2. (ARTHRO: Insecta) Cells<strong>of</strong> the fat body <strong>of</strong> the embryo. 3. (PORIF) In fresh-watersponges, nurse cells involved in the initial stages <strong>of</strong> gemmuleformation; archaeocytes.

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