protocephalon
See: acron [Martin, 2005].
Anteriormost part of the body bearing eyes [Perez Farfante and Kensley, 1997].
See: acron [McLaughlin, 1980].
(Order Decapoda):
Term applied to anteriormost region of head (cephalon), especially when this is free of carapace. Consists of eyes and eyestalks, antennules, antennae, and labrum (i.e., of acron and first cephalic somite) [Stachowitsch, 1992].
(Order Euphausiacea):
Anteriormost region of head (cephalon); consists of eyes and first two head segments (antennular and antennal somites) and is movably articulated with rest of head [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • Protocephalon — Protocẹphalon   [zu griechisch kephale̅ »Kopf«] das, s, bei Gliederfüßern das vorderste Kopfsegment. Der im Protocephalon befindliche Teil des Oberschlundganglions, das Protocerebrum, ist Sitz der Zentren für die Verarbeitung der höheren… …   Universal-Lexikon

  • protocephalon — n. [Gr. protos, first; kephale, head] 1. (ARTHROPODA: Insecta) The procephalic part of the definitive head during evolutionary stages. 2. (ARTHROPODA: Crustacea) see acron …   Dictionary of invertebrate zoology

  • protocephalon — pro·to·cephalon …   English syllables

  • protocephalon — |prōd.(ˌ)ō+ noun (plural protocephala) Etymology: New Latin, from prot + cephalon 1. : the part of an insect embryo that consists of the prostomium and the first postoral somite 2. : the primitive arthropod head correspon …   Useful english dictionary

  • 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

  • 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

  • 原头 — yuántóu (1) [protocephalon] (2) 昆虫胚胎的部分, 由口前叶和第一口后体节所组成 (3) 原始节足动物的头部, 相当于感觉器官而与较高级形态的头部取食部分相区别, 大概相当于环节动物的口前叶 …   Advanced Chinese dictionary

  • gnathocephalon — ˌ ̷ ̷(ˌ)thōˈsefəˌlän, lən noun Etymology: New Latin, from gnath + cephalon : the part of the insect head that lies behind the protocephalon, consists of several fused segments, and bears the mandibles and maxillae …   Useful english dictionary

  • gnathothorax — “+ noun Etymology: gnath + thorax : the thorax and the part of the head bearing the feeding organs of an arthropod regarded as one of the primary body regions compare protocephalon …   Useful english dictionary

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