Definitions

Pleon

• A term that refers to the abdomen in malacostracans. [Brusca and Brusca, 2002]
• Abdomen of crustacean. [Moore and McCormick, 1969]
• Abdominal body division, usually comprising five somites and often bearing biramous pleopods. [Holdich and Jones, 1983]
• See abdomen; also first 3 abdominal somites of amphipods. [McLaughlin, 1980]
• (Taxon-specific: Order Cumacea) Posterior division (tagma) of body (either cephalon, pereon, pleon or cephalothorax, pleon). Narrow, consisting of six somites (pleonites) bearing posterior telson.
  (syn. abdomen) [Stachowitsch, 1992]
• (Taxon-specific: Order Tanaidacea) Posterior of three divisions (tagmata) of body (either head, thorax, pleon, or head, pereon, pleon). Consists basically of six somites (pleomeres) bearing posterior telson.
  (syn. abdomen)
  See: Pleotelson   [Stachowitsch, 1992]
• (Taxon-specific: Order Decapoda) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Order Amphipoda) Posterior division (tagma) of body (cephalon, pereon, pleon) consisting basically of six somites (pleomeres). May be further subdivided into anterior pleosome and posterior urosome. Reduced or absent in certain amphipods.
  (syn. abdomen) [Stachowitsch, 1992]
• (Taxon-specific: Order Isopoda) Abdomen. [Wetzer et al. 1997]
• (Taxon-specific: Order Isopoda) Posterior division (tagma) of body (cephalon, pereon, pleon) consisting basically of six segments (pleonites).
  (syn. abdomen)
  See: Pleotelson   [Stachowitsch, 1992]
• (Taxon-specific: Order Isopoda) Posterior or abdominal region of the body, primitively consisting of six segments or pleonites, and bearing paired pleopod and uropod appendages. [Kensley and Schotte, 1989]
• (Taxon-specific: Order Mysida) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Order Stomatopoda) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Order Leptostraca) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Subclass Branchiura) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Class Ostracoda) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Superorder Syncarida) Abdomen. [Stachowitsch, 1992]
• (Taxon-specific: Order Thermosbaenacea) Abdomen. [Stachowitsch, 1992]

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Citing this glossary: For individual definitions, please cite the specific author(s) of the definition.
To cite the glossary as a whole, please use:
Martin, J.W., N.D. Pentcheff, D. Striley, C. Perrodin, A.R. Wall, J. Wall, and J. Zieba (editors). Crustacea Glossary. Crustacea Department, Natural History Museum of Los Angeles County. Accessed: 21 Nov 2024. URL: https://research.nhm.org/glossary