- 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. Natural History Museum of Los Angeles County. 2011.