preoral sting

preoral sting
(ARTHROPODA: Crustacea)
In Branchiura, a retractile piercing structure with a basal poison gland, between the maxillulae (suction discs).

Online Dictionary of Invertebrate Zoology. . 2005.

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  • preoral sting — (Subclass Branchiura): On underside of cephalothorax, unpaired projection anterior to proboscis. Distal half of anteriorly directed preoral sting can be retracted into basal socket. Needlelike tip nears opening of poison gland. Used to puncture… …   Crustacea glossary

  • poison gland — (Subclass Branchiura): Gland located at base of preoral sting; opens at tip of sting via duct [Stachowitsch, 1992] …   Crustacea glossary

  • cephalon — A term that refers to the head of a crustacean [Brusca and Brusca, 2002]. Anterior region of the body bearing the antennules, antennae, eyes, mandibles, maxillules, and maxillae [Holdich and Jones, 1983]. Anteriormost tagma, bearing eyes, mouth,… …   Crustacea glossary

  • proboscis — (Subclass Branchiura): On underside of cephalothorax, unpaired median projection posterior to preoral sting. Retractile, enclosing mouth and surrounding labrum, mandibles, and paragnaths. Supported distally by series of chitinous bars. Used to… …   Crustacea glossary

  • scorpion — scorpionic /skawr pee on ik/, adj. /skawr pee euhn/, n. 1. any of numerous arachnids of the order Scorpionida, widely distributed in warmer parts of the world, having a long, narrow, segmented tail that terminates in a venomous sting. 2. the… …   Universalium

  • Chelicerata — Temporal range: 445–0 Ma …   Wikipedia

  • Spider — Taxobox name = Spiders image width = 250px image caption = an Orb weaver spider, Family: Araneidae regnum = Animalia phylum = Arthropoda subphylum = Chelicerata classis = Arachnida ordo = Araneae ordo authority = Clerck, 1757 diversity link =… …   Wikipedia

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