ocular peduncle

ocular peduncle
(ARTHROPODA: Crustacea)
A movable peduncle (eyestalk) with a compound eye at the distal end, sometimes with two or three segments, sometimes retractable.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • ocular peduncle — See: eyestalk [Martin, 2005]. Eyestalk [Williams, 1984]. Peduncle movably articulated with cephalon, with compound eye at distal end, sometimes with two or three segments, sometimes retractable. (Syn. eyestalk) [McLaughlin, 1980]. (Order… …   Crustacea glossary

  • peduncle — A stalk like structure [AHD]. Basal portion of certain appendages; also fleshy part of body in some cirripeds (Lepadomorpha), between capitulum and attachment to substrate with or without armor of chitinous or calcareous beads, scales, or… …   Crustacea glossary

  • ocular scale — Articulating plate attached mesially on eyestalks (some Anomura, Stomatopoda) [Poore, 2004]. Scale like structure located on basal segment of eyestalk (Fig. 3A) [Perez Farfante and Kensley, 1997]. (Order Stomatopoda): One of two small, dorsally… …   Crustacea glossary

  • eyestalk — A pre segmental appendage on either side of the median line of the carapace and bearing on its distal surface the cornea [Ingle, 1983]. Articulating eye comprising peduncle and (usually) pigmented cornea [Poore, 2004]. Peduncle movably… …   Crustacea glossary

  • eye — (Order Cumacea): Photosensitive organ on dorsal surface of carapace; typically unpaired and positioned on ocular lobe (paired, unpaired) [Stachowitsch, 1992]. (Order Tanaidacea): One of two photosensitive organs on carapace; positioned… …   Crustacea glossary

  • compound eye — Array of contiguous ommatidia having common optic nerve trunk; paired [Moore and McCormick, 1969]. Paired array of contiguous ommatidia having common optic nerve trunks [McLaughlin, 1980]. (Order Cladocera): One of two large photosensitive organs …   Crustacea glossary

  • ophthalmic scale — (Order Decapoda): Scale like projection on proximal segment of eye stalk (ocular peduncle). (unarmed, acuminate, serrate, with spines). See: ocular acicle [Stachowitsch, 1992] …   Crustacea glossary

  • orbit — Cavity in carapace containing eye [Williams, 1984]. Circular opening in front part of some decapod carapaces enclosing eyestalk [Moore and McCormick, 1969]. Circular to rectangular opening in anterior face of carapace supporting ocular peduncle… …   Crustacea glossary

  • papilla — (Order Mysida): Tube or finger shaped projection from inner surface of each ocular peduncle. (Syn. ocular papilla) [Stachowitsch, 1992]. (Class Ostracoda): Type of valve sculpture: small, step sided projection (one order of magnitude smaller tan… …   Crustacea glossary

  • eyestalk — see ocular peduncle …   Dictionary of invertebrate zoology

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