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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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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 701In Gnathiidea Isopoda, the first thoracopod <strong>of</strong> the male; itmay be flattened and cover the buccal cavity or in juvenilesbe shaped as a hook.pneumatization n. [Gr. pneuma, air] (ARTHRO: Insecta) Aprocess completed in an embryonic tracheal system whenliquid is replaced by gas. pneumatized a.pneumatized a. [Gr. pneuma, air] Having air cavities.pneumatocodon n. [Gr. pneuma, air; kodon, bell] (CNID: Hydrozoa)In Siphonophora, the external wall <strong>of</strong> a float.pneumatophore n. [Gr. pneuma, air; phoreus, bearer] (CNID:Hydrozoa) In Siphonophora, a muscular organ that possessesa gas secreting gland and functions as an air sacfloat <strong>of</strong> a colony.pneumatosaccus n. [Gr. pneuma, air; sakkos, sac] (CNID:Hydrozoa) In Siphonophora, an air sac; an internal subumbrellanwall.pneumostome n. [Gr. pneuma, air; stoma, mouth] (MOLL:Gastropoda) A pore connecting the pulmonate lungs withthe exterior.pneumotaxis n. [Gr. pneuma, air; taxis, arrangement] A reactionto gases, particularly carbon dioxide.poculiform a. [L. poculum, cup; forma, shape] Cup-shaped;goblet-shaped.pod n. [ME. pod, bag] (ARTHRO: Insecta) Eggs cemented togetherin a mass, particularly in Orthoptera.podeon see propodeum, metapodeonpodial opening/pore (ECHINOD: Asteroidea) The passagebetween ambulacrals for passage <strong>of</strong> the tube foot.podilegous a. [Gr. pous, foot; legere, to collect] (ARTHRO: Insecta)Having pollen baskets on the legs.podite n. [Gr. pous, foot] (ARTHRO) A limb segment; podomere.podium n.; pl. podia [Gr. pous, foot] (ECHINOD: Asteroidea)The cyclindrical outer part <strong>of</strong> the tube foot.podobranch n. [Gr. pous, foot; branchia, gills] (ARTHRO:Crustacea) Gills borne on the coxa <strong>of</strong> the thoracopod; po-

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