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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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542Maggenti and Gardnermediolateral nerve cord (NEMATA) Several nerves extendingfrom the median and posterior externolateral ganglia andthe posterior internolateral ganglia to the lumbar ganglia.mediotergite n. [L. medius, middle; tergum, back] (ARTHRO:Insecta) In Diptera, the median region <strong>of</strong> the mesopostnotum.medioventral a. [L. medius, middle; venter, belly] In the middleventral line.mediproboscis see haustellummedulla n. [L. medulla, marrow, pith] 1. Central portion <strong>of</strong> anorgan. 2. (ARTHRO) Apical lobes <strong>of</strong> the brain; the centralsynaptic region; epiopticon; medulla externa; external medullarymass.medulla externa see medullamedulla interna (ARTHRO: Insecta) The lobular complex.medulla X-organ, medulla terminalis ganglionic X-organ,MTGX (ARTHRO: Crustacea) A group <strong>of</strong> neurosecretory cellsin the medulla terminalis; the main source <strong>of</strong> eyestalkhormones.medusa n.; pl. -sae [L. Medusa, a gorgon <strong>of</strong> mythology](CNID) The free swimming umbrella-like forms.megabenthos see abyssobenthosmegacephalic a. [Gr. megas, large; kephale, head] Having anabnormally large head. see microcephalic, mesocephalic.megaclad n. [Gr. megas, large; klados, branch] (PORIF) Inmegascleres, a relatively large smooth desma; megaclone.megaclone see megacladmegadrile n. [Gr. megas, large; drilos, worm] (ANN: Oligochaeta)Terrestrial forms; not used systematically, althoughrecognized as a general term. see microdrile.megalaesthetes n.pl. [Gr. megas, large; aisthesis, sensation](MOLL: Polyplacophora) Large sensory organs terminatingin the tegmentum in the forms <strong>of</strong> eyes with cornea, lens,pigment layers, iris and retina. see micraesthetes.megalolecithal see macrolecithal

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