Periclimenaeus

Periclimenaeus is a genus of decapod crustaceans of the family Palaemonidae which is part of the 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 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 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 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, 2014Periclimenaeus arabicus Periclimenaeus ardeae Bruce, 1970Periclimenaeus arthrodactylus Holthuis, 1952Periclimenaeus ascidiarum Holthuis, 1951Periclimenaeus atlanticus Periclimenaeus aurae dos Santos, Calado & Araújo, 2008Periclimenaeus aurantiacus Bruce, 2014Periclimenaeus bermudensis Periclimenaeus bidentatus Bruce, 1970Periclimenaeus bouvieri Periclimenaeus bredini Chace, 1972Periclimenaeus brucei Cardoso & Young, 2007Periclimenaeus calmani Bruce, 2012Periclimenaeus caraibicus Holthuis, 1951Periclimenaeus chacei Abele, 1971Periclimenaeus colemani Bruce, 2014Periclimenaeus colodactylus Bruce, 1996Periclimenaeus crassipes Periclimenaeus creefi Bruce, 2010Periclimenaeus crosnieri Cardoso & Young, 2007Periclimenaeus dactylodon Bruce, 2012Periclimenaeus denticulodigitus Bruce, 2014Periclimenaeus devaneyi Bruce, 2010Periclimenaeus diplosomatis Bruce, 1980Periclimenaeus djiboutensis Bruce, 1970Periclimenaeus echinimanus Ďuriš, Horka & Al-Horani, 2011Periclimenaeus edmondsoni Bruce, 2013Periclimenaeus fawatu Bruce, 2006Periclimenaeus forcipulatus Bruce, 2014Periclimenaeus garthi Bruce, 1976Periclimenaeus gorgonidarum Periclimenaeus hancocki Holthuis, 1951Periclimenaeus hebedactylus Bruce, 1970Periclimenaeus hecate Periclimenaeus heronensis Bruce, 2010Periclimenaeus holthuisi Bruce, 1969Periclimenaeus jeancharcoti Bruce, 1991Periclimenaeus kottae Bruce, 2005Periclimenaeus leptodactylus Fujino & Miyake, 1968Periclimenaeus lobiferus Bruce, 1978Periclimenaeus manihinei Bruce, 1976Periclimenaeus marini Bruce, 2013Periclimenaeus matherae Bruce, 2005Periclimenaeus maxillulidens Periclimenaeus minutus Holthuis, 1952Periclimenaeus mortenseni Bruce, 1993Periclimenaeus myora Bruce, 1998Periclimenaeus nielbrucei Bruce, 2006Periclimenaeus nobilii Bruce, 1975Periclimenaeus nufu Ďuriš, Horká & Hoc, 2009Periclimenaeus orbitocarinatus Fransen, 2006Periclimenaeus orontes Bruce, 1986Periclimenaeus pachydentatus Bruce, 1969Periclimenaeus pachyspinosus Marin, 2007Periclimenaeus pacificus Holthuis, 1951Periclimenaeus palauensis Miyake & Fujino, 1968Periclimenaeus parkeri Bruce, 2012Periclimenaeus pearsei Periclimenaeus pectinidactylus Ďuriš, Horká & Sandford, 2009Periclimenaeus perlatus Periclimenaeus pulitzerfinali ^{Bruce, 2011}Periclimenaeus quadridentatus Periclimenaeus rastrifer Bruce, 1980Periclimenaeus rhodope Periclimenaeus robustus Borradaile, 1915Periclimenaeus schmitti ^{Holthuis, 1951}Periclimenaeus serenei Bruce, 2012Periclimenaeus serrula Bruce & Coombes, 1995Periclimenaeus solitus Bruce & Coombes, 1995Periclimenaeus spinosus Holthuis, 1951Periclimenaeus spongicola Holthuis, 1952Periclimenaeus storchi Bruce, 1989Periclimenaeus stylirostris Bruce, 1969Periclimenaeus tchesunovi Ďuriš, 1990Periclimenaeus tridentatus Periclimenaeus trispinosus Bruce, 1969Periclimenaeus tuamotae Bruce, 1969Periclimenaeus uropodialis Barnard, 1958Periclimenaeus usitatus Bruce, 1969Periclimenaeus wilsoni Periclimenaeus wolffi Bruce, 1993Periclimenaeus zanzibaricus Bruce, 1969Periclimenaeus zarenkovi Ďuriš, 1990