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A NEW SPECIES OF ALPHEUS (DECAPODA, CARIDEA, ALPHEIDAE) FROM KAGOSHIMA BAY, JAPAN

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A new species, Alpheus kagoshimanus, collected from considerable depths of Kagoshima Bay, is described and illustrated, including its live colouration. It belongs to the brevirostris species-group. A distinct pterygostomial spine readily distinguishes the new species from all other members of this group as well as from all the known species of the genus Alpheus. Apart from this character, it bears much resemblance to A. acutocarinatus De Man and A. migrans Lewinsohn & Holthuis in having the remarkably long first pereopods and the middorsal carina of the carapace with a small, interrupted tubercle. More slender first pereopods with 2-8 movable spines on the ischium and the longer first carpal article of the second pereopod are the other characters of the new species.

Une nouvelle espèce, Alpheus kagoshimanus, récoltée à grande profondeur dans la baie de Kagoshima, est décrite et illustrée, y compris sa couleur à l'état vivant. Elle appartient au groupe brevirostris. La présence d'une épine ptérygostomienne distincte la distingue nettement des autres membres de ce groupe comme des autres espèces du genre Alpheus. Ce caractère mis à part, l'espèce ressemble beaucoup à A. acutocarinatus De Man et A. migrans Lewinsohn & Holthuis par les premiers péréiopodes remarquablement longs et un petit tubercule émoussé sur la carène médiodorsale de la carapace. Les premiers péréiopodes plus grêles, portant 2-8 épines mobiles sur l'ischion et le premier article du carpe du second péréiopode plus long sont les autres caractères distinctifs de la nouvelle espèce.

Affiliations: 1: National Fisheries University, 2-7-1 Nagata-honmachi, Shimonoseki, Yamaguchi 759-6595, Japan

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