presegmental region

presegmental region
See: acron [Martin, 2005].
See: acron [McLaughlin, 1980].

Crustacea glossary. . 2011.

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  • presegmental region — see acron …   Dictionary of invertebrate zoology

  • acron — Anteriormost part of body carrying eyes, not considered to be true cephalic somite. (Syn. ophthalmic somite, presegmental region. (Some authors recognize as protocephalon anterior part of head) [Moore and McCormick, 1969]. Anteriormost part of… …   Crustacea glossary

  • acron — n. [Gr. akros, tip] 1. (ARTHROPODA) The anterior unsegmented, or indistinguishably fused, body segments. adj. In Crustacea, ophthalmic somite; presegmental region. b. In Insecta, the prostomium. 2. (MOLLUSCA) The prostomal region of trochophore… …   Dictionary of invertebrate zoology

  • crustacean — /kru stay sheuhn/, n. 1. any chiefly aquatic arthropod of the class Crustacea, typically having the body covered with a hard shell or crust, including the lobsters, shrimps, crabs, barnacles, and wood lice. adj. 2. belonging or pertaining to the… …   Universalium

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