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 the body carrying the eyes; not considered true cephalic somite. (Syn. opthalmic somite, presegmental region) [McLaughlin, 1980].
(Order Decapoda):
Anterior segment of body (although not considered to be a true somite); bears eyestalks (ocular peduncles). Acron and first cephalic somite occasionally interpreted as representing protocephalon. (Syn. ophthalmic somite, pre-segmental region) [Stachowitsch, 1992].
(Order Stomatopoda):
Anteriormost segment of body (although not considered to be a true somite); divided into three plates-fastigial, ocular, and postocular- of which the median ocular plate bears the eyestalks (ocular peduncles). Not covered by carapace, although rostrum may partially or entirely extend across acron. (Syn. opthalmic somite) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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  • Acron — Acron, son of Xenon, was an eminent Greek physician born at Agrigentum. His exact date is not known; but, as he is mentioned as being contemporary with Empedocles, who died about the beginning of the Peloponnesian war, he must have lived in the… …   Wikipedia

  • Acron — bezeichnet unter anderem: ein Fluss im US Bundesstaat Alabama, siehe Acron Creek eine Geisterstadt im US Bundesstaat Florida, siehe Acron (Florida) den Kopflappen, siehe Prostomium Siehe auch: Akron (Begriffsklärung) …   Deutsch Wikipedia

  • Acron — ACRON, ónis, ein muthiger, junger Mensch von Corythus, in Tuscien, der dem Aeneas wider den Turnus zu Hülfe kam, allein auch in der Schlacht von dem Mezentius, Könige der Tyrrhener, erleget wurde. Virgil. Aen. lib. X. v. 719. seqq …   Gründliches mythologisches Lexikon

  • acron — [akʀɔ̃] n. m. ÉTYM. 1960, in Larousse; du grec akron « extrémité ». → Acro . ❖ ♦ Zool. Région céphalique primaire du corps des arthropodes, placée avant la bouche et portant le labre et les organes sensoriels …   Encyclopédie Universelle

  • Acron — Acron, bei Arthropoden (Gliederfüßer) vor dem Mund liegende Region …   Deutsch wörterbuch der biologie

  • ACRON — I. ACRON Ceninensium Rex, quem ob raptus Virginum Sabinarum Romulus singulari certamine vicit, teloque traiecit, et spolia cius opima, i. e. exuvias eruentas, Iovi Feretrio dicavit, Plut, in Rom. Etenim, inquit, Ferire apud Romanos erat Vulner… …   Hofmann J. Lexicon universale

  • Acron — Pour les articles homonymes, voir Acron (homonymie). Acron, roi des Céniniens, fit la guerre à Rome naissante (748 av. J. C.) qui avait enlevé des femmes de son peuple (cf. l enlèvement des Sabines). Romulus le battit, le tua de sa propre main et …   Wikipédia en Français

  • 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

  • acron — acronal /ak reuh nl/, adj. /ak ron, reuhn/, n. the unsegmented, preoral portion of the body of an arthropod. [ < NL < Gk ákron, neut. sing. of ákros; see ACRO ] * * * …   Universalium

  • acron — dacron …   Dictionnaire des rimes

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