n. [Gr. petasma, something spread out]
(ARTHROPODA: Crustacea)
Complex male copulatory organs with coupling hooks on the first pair of pleopods.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • petasma — A complex genital structure attached to the mesial margins of the protopodites of the first pair of pleopods in male penaeidean shrimps [Chace and Hobbs, 1969]. Abdominal appendage modified as gonapophysis in males of some eucarids, syncarids,… …   Crustacea glossary

  • petasma — pe·tas·ma …   English syllables

  • petasma — pəˈtazmə noun ( s) Etymology: New Latin, from Greek, something spread out; akin to Greek petannynai to spread out : a membranous modified endopodite of the first abdominal appendage in a male decapod crustacean …   Useful english dictionary

  • closed petasma — The lateral lobes are heavily sclerotized, sometimes making structure virtually rigid, with the ventral costae situated ventromesially, almost abutting, and delimiting a small, sometimes extremelyso, space; lateral lobe usually produced distally… …   Crustacea glossary

  • open petasma — The lateral lobes are quite flexible, partially or entirely extended laterally, with the ventral costae not or barely turned ventrally. See: petasma [Perez Farfante and Kensley, 1997] …   Crustacea glossary

  • semi-closed petasma — The lateral lobes are rather flexable, markedly folded, supported by strong ribs, with the ventral costae approaching rather closely, delimiting moderately large space, narrowly open distally where usually overlapped by well developed distomedian …   Crustacea glossary

  • semi-open petasma — The lateral lobes are flexable but folded, with the ventral costae distinctly turned ventromesially, delimiting relatively ample space extending from proximal to distal ends. See: petasma [Perez Farfante and Kensley, 1997] …   Crustacea glossary

  • pleopod — An appendage attached to an abdominal segment [Ingle, 1983]. An appendage of any one of the first five abdominal segments [Warner, 1977]. Biramous, often natatory, appendage of pleon [Holdich and Jones, 1983]. Distinctive, usually biramous,… …   Crustacea glossary

  • spermatophore — A packet of sperms transferred by a male shrimp, lobster or crab to the female during mating [Bliss, 1982]. Mass of spermatozoa deposited by gonopods of male on to thoracic sternum or into seminal receptacle of female [Poore, 2004]. Packet… …   Crustacea glossary

  • Lucifer (prawn) — Taxobox name = Lucifer regnum = Animalia phylum = Arthropoda subphylum = Crustacea classis = Malacostraca ordo = Decapoda subordo = Dendrobranchiata superfamilia = Sergestoidea familia = Luciferidae familia authority = De Haan, 1849 genus =… …   Wikipedia

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