cephalic somite


cephalic somite
(ARTHROPODA: Crustacea)
A unit division of the cephalic region usually recognized as one of five somites that bear distinctive paired appendages; a cephalomere.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • cephalic somite — One unit of cephalon bearing distnctive pair of appendages. (Syn. cephalomere) [McLaughlin, 1980]. Unit division of head region, generally recognized as one of five such parts which bear distinctive paired appendages (antennules, antennae,… …   Crustacea glossary

  • somite — A body segment, especially of the abdomen [Chace and Hobbs, 1969]. Body segment, as in abdominal somites 1 6 [Poore, 2004]. Body segment, especially of the abdomen [Butler, T.H.]. Division of body (head, thorax, abdomen) with exoskeleton… …   Crustacea glossary

  • cephalic lobes — 1. (ARTHROPODA: Insecta) In embryology, the region of the prostomium, and usually that of the tritocerebral somite. 2. (NEMERTEA) Brain lobes on the expanded anterior region …   Dictionary of invertebrate zoology

  • body somite — (ARTHROPODA: Crustacea) A unit division comprising thorax and abdomen; see cephalic somite …   Dictionary of invertebrate zoology

  • body somite — Generally refers to unit division of thorax + abdomen in contrast to cephalic somite [Moore and McCormick, 1969] …   Crustacea glossary

  • cephalomere — Cephalic somite [Moore and McCormick, 1969]. See: cephalic somite [McLaughlin, 1980]. (Order Decapoda): Cephalic somite [Stachowitsch, 1992] …   Crustacea glossary

  • maxillule — Cephalic appendages next behind mandible, serving as mouth part. (Syn. first maxilla, maxillula. In cirripeds, also termed inner maxilla) [Moore and McCormick, 1969]. First maxilla; mouthparts immediately posterior to mandibles [Brusca and Brusca …   Crustacea glossary

  • 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

  • antennule — First cephalic appendage, usually with peduncle of three articles and two multiarticulate flagella (sometimes antenna 1) [Poore, 2004]. First pair of cephalic appendages (antenna 1) [Holdich and Jones, 1983]. First pair of feelers, or antennae… …   Crustacea glossary

  • mandible — Most anterodorsally situated of gnathal appendages; one, of a pair, of heavily calcified jaws; the teeth. [Hobbs and Jass, 1988]. On of the heavily calcified jaws lying anterior to (beneath, in ventral view) the other mouth parts but visible in… …   Crustacea glossary


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