''Periclimenaeus'' is a genus of decapoda, decapod crustaceans of the family Palaemonidae which is part of the Order (biology), infraorder Caridea. The genus was named by the English carcinologist Lancelot Alexander Borradaile in 1915. He set out the distinguishing features of the genus as: ''Pericimaenaeus robustus'' is known only from the type specimen which was collected off Amirante Islands by the Western Indian Ocean Expeditions of John Stanley Gardiner, Prof. J. Stanley Gardiner and described in 1915 and again in 1917 by Borradaile, it was re-described by Dr A.J. "Sandy" Bruce of the Queensland Museum in 2005.

Biological notes

''Periclimenaeus'' consists of number of species of small shrimps classified in the subfamily Pontoniinae. They occur mainly in tropical seas, especially in and around coral reefs. ''Periclimanaeus'' shrimps live in association with a variety of hosts, mostly sponges and ascidian tunicates, where they normally live in the hosts' internal cavities as pairs formed of a male and a female. Characteristics of the genus include the presence of grossly unequal chelae on the second pair of walking legs, the larger of which has a conspicuous molar process on the seventh and terminal segment of the leg, which sits opposite a depression on the fixed finger, this is used to produce sound, a feature which is Convergent evolution, convergent with similar structures in the related genus ''Coralliocaris'' and in some unrelated genera of snapping shrimps from the family Alpheidae.

Species

''Periclimenaeus'' is the genus in the Palaemonidae with the second highest number of species with their distribution centred on the Indo-West Pacific region where there are 60 or so species with a further 14 identified so far in the Atlantic and eastern Pacific. The first species to be described was described from specimens caught in the Torres Strait by HMS Alert (1856), HMS ''Alert'' during 1881-82. These specimens were described by Edward J. Miers as ''Coralliocaris tridendatus'', this was then assigned to ''Periclimenaeus'' as ''P. tridentatus'' after Borradaile named the genus. The following species are currently recognised: * ''Periclimenaeus ancylodactylus'' Bruce, 2014 * ''Periclimenaeus arabicus'' (Calman, 1939) * ''Periclimenaeus ardeae'' Bruce, 1970 * ''Periclimenaeus arthrodactylus'' Holthuis, 1952 * ''Periclimenaeus ascidiarum'' Holthuis, 1951 * ''Periclimenaeus atlanticus'' (Rathbun, 1901) * ''Periclimenaeus aurae'' dos Santos, Calado & Araújo, 2008 * ''Periclimenaeus aurantiacus'' Bruce, 2014 * ''Periclimenaeus bermudensis'' (Armstrong, 1940) * ''Periclimenaeus bidentatus'' Bruce, 1970 * ''Periclimenaeus bouvieri'' (Nobili, 1904) * ''Periclimenaeus bredini'' Chace, 1972 * ''Periclimenaeus brucei'' Cardoso & Young, 2007 * ''Periclimenaeus calmani'' Bruce, 2012 * ''Periclimenaeus caraibicus'' Holthuis, 1951 * ''Periclimenaeus chacei'' Abele, 1971 * ''Periclimenaeus colemani'' Bruce, 2014 * ''Periclimenaeus colodactylus'' Bruce, 1996 * ''Periclimenaeus crassipes'' (Calman, 1939) * ''Periclimenaeus creefi'' Bruce, 2010 * ''Periclimenaeus crosnieri'' Cardoso & Young, 2007 * ''Periclimenaeus dactylodon'' Bruce, 2012 * ''Periclimenaeus denticulodigitus'' Bruce, 2014 * ''Periclimenaeus devaneyi'' Bruce, 2010 * ''Periclimenaeus diplosomatis'' Bruce, 1980 * ''Periclimenaeus djiboutensis'' Bruce, 1970 * ''Periclimenaeus echinimanus'' Ďuriš, Horka & Al-Horani, 2011 * ''Periclimenaeus edmondsoni'' Bruce, 2013 * ''Periclimenaeus fawatu'' Bruce, 2006 * ''Periclimenaeus forcipulatus'' Bruce, 2014 * ''Periclimenaeus garthi'' Bruce, 1976 * ''Periclimenaeus gorgonidarum'' (Balss, 1913) * ''Periclimenaeus hancocki'' Holthuis, 1951 * ''Periclimenaeus hebedactylus'' Bruce, 1970 * ''Periclimenaeus hecate'' (Nobili, 1904) * ''Periclimenaeus heronensis'' Bruce, 2010 * ''Periclimenaeus holthuisi'' Bruce, 1969 * ''Periclimenaeus jeancharcoti'' Bruce, 1991 * ''Periclimenaeus kottae'' Bruce, 2005 * ''Periclimenaeus leptodactylus'' Fujino & Miyake, 1968 * ''Periclimenaeus lobiferus'' Bruce, 1978 * ''Periclimenaeus manihinei'' Bruce, 1976 * ''Periclimenaeus marini'' Bruce, 2013 * ''Periclimenaeus matherae'' Bruce, 2005 * ''Periclimenaeus maxillulidens'' (Schmitt, 1936) * ''Periclimenaeus minutus'' Holthuis, 1952 * ''Periclimenaeus mortenseni'' Bruce, 1993 * ''Periclimenaeus myora'' Bruce, 1998 * ''Periclimenaeus nielbrucei'' Bruce, 2006 * ''Periclimenaeus nobilii'' Bruce, 1975 * ''Periclimenaeus nufu'' Ďuriš, Horká & Hoc, 2009 * ''Periclimenaeus orbitocarinatus'' Fransen, 2006 * ''Periclimenaeus orontes'' Bruce, 1986 * ''Periclimenaeus pachydentatus'' Bruce, 1969 * ''Periclimenaeus pachyspinosus'' Marin, 2007 * ''Periclimenaeus pacificus'' Holthuis, 1951 * ''Periclimenaeus palauensis'' Miyake & Fujino, 1968 * ''Periclimenaeus parkeri'' Bruce, 2012 * ''Periclimenaeus pearsei'' (Schmitt, 1932) * ''Periclimenaeus pectinidactylus'' Ďuriš, Horká & Sandford, 2009 * ''Periclimenaeus perlatus'' (Boone, 1930) * ''Periclimenaeus pulitzerfinali'' ^{Bruce, 2011} * ''Periclimenaeus quadridentatus'' (Rathbun, 1906) * ''Periclimenaeus rastrifer'' Bruce, 1980 * ''Periclimenaeus rhodope'' (Nobili, 1904) * ''Periclimenaeus robustus'' Borradaile, 1915 * ''Periclimenaeus schmitti'' ^{Holthuis, 1951} * ''Periclimenaeus serenei'' Bruce, 2012 * ''Periclimenaeus serrula'' Bruce & Coombes, 1995 * ''Periclimenaeus solitus'' Bruce & Coombes, 1995 * ''Periclimenaeus spinosus'' Holthuis, 1951 * ''Periclimenaeus spongicola'' Holthuis, 1952 * ''Periclimenaeus storchi'' Bruce, 1989 * ''Periclimenaeus stylirostris'' Bruce, 1969 * ''Periclimenaeus tchesunovi'' Ďuriš, 1990 * ''Periclimenaeus tridentatus'' (Miers, 1884) * ''Periclimenaeus trispinosus'' Bruce, 1969 * ''Periclimenaeus tuamotae'' Bruce, 1969 * ''Periclimenaeus uropodialis'' Barnard, 1958 * ''Periclimenaeus usitatus'' Bruce, 1969 * ''Periclimenaeus wilsoni'' (Hay, 1917) * ''Periclimenaeus wolffi'' Bruce, 1993 * ''Periclimenaeus zanzibaricus'' Bruce, 1969 * ''Periclimenaeus zarenkovi'' Ďuriš, 1990

References

{{Taxonbar, from=Q4482956 Palaemonoidea