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Leontocaris Alexander, a New Deepwater Hippolytid Shrimp from Tasmanian Seamounts and a Phylogeny of the Genus (Decapoda, Caridea)

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Leontocaris Stebbing, 1905 is a genus of hippolytid shrimps with a distinctive major pereopod having a blade-like dactylus closing on a massive propodus, together supported by extensible folded proximal articles. A new species, Leontocaris alexander, is described from south-eastern Australia bringing the total number of species to eight. A phylogeny of the species demonstrates L. alexander is similar to L. paulsoni Stebbing, 1905 from South Africa and L. pacificus Zarenkov, 1976 from the south-eastern Pacific. With less confidence, L. amplectipes Bruce, 1990 and L. yarramundi Taylor & Poore, 1998 from south-eastern Australia and L. lar Kemp, 1906 from north-western Atlantic are similar, and L. bulga Taylor & Poore, 1998 from south-eastern Australia and L. vanderlandi Fransen, 2001 from the Indian Ocean are sister taxa. The phylogeny does not reflect geographic distribution. Leontocaris Stebbing, 1905 est un genre de crevettes Hippolytidés qui se distingue par un péréiopode majeur muni d'un dactyle en forme de lame se refermant sur un propode massif, le tout soutenu par les articles proximaux pliés et extensibles. Une nouvelle epèce, Leontocaris alexander, est décrite d'Australie du sud-est, portant à huit le nombre d'espèces connues. Une étude phylogénique des espèces montre que L. alexander est très proche de L. paulsoni Stebbing, 1905 d'Afrique du Sud et de L. pacificus Zarenkov, 1976 du sud-est Pacifique. Avec un degré de confiance moindre, L. amplectipes Bruce, 1990, L. yarramundi Taylor & Poore, 1998 d'Australie du sud-est et L. lar Kemp, 1906 d'Atlantique du nord-ouest sont semblables, et L. bulga Taylor & Poore, 1998 d'Australie du sud-est et L. vanderlandi Fransen, 2001 de l'Océan Indien sont des taxons-frères. La phylogénie ne réflète pas la répartition géographique.

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/content/journals/10.1163/156854009x427478
2009-06-01
2015-01-31

Affiliations: 1: Museum Victoria, GPO Box 666, Melbourne, Vic. 3001, Australia;, Email: gpoore@museum.vic.gov.au

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