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A new species of the genus Ingolfiella Hansen, 1903 (Peracarida, Amphipoda) from the Ogasawara Islands, southern Japan

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A new ingolfiellid amphipod, Ingolfiella ogasawarensis n. sp. is described from shallow water off the Ogasawara Islands, southern Japan. The new species differs from its congeners primarily by having a moderately thick body; pereionites 2-7, pleonites 1-3, and urosomites 1-3 each bearing a pair of dorsal setae; a broad dorsal crest on the basis of gnathopod 1; 6 minute teeth, 1 long stout palmar angle spine, 1 short stout seta, and 8 slender simple setae on the ventral margin of the carpus of gnathopod 2; propodi of pereiopods 3 and 4 longer than the carpi; uropod 1 shorter than uropod 2; and the first spine on the inner ramus of uropod 1 larger than the following three spines. Un nouvel amphipode Ingolfiellidae, Ingolfiella ogasawarensis n. sp. est décrit des eaux peu profondes au large des îles Ogasawara, au sud du Japon. La nouvelle espèce diffère de ses congénères tout d'abord par le corps modérément épais ; les péréionites 2-7, les pléonites 1-3, et les urosomites 1-3 portant chacun une paire de soies dorsales ; une large crête dorsale sur le basis du gnathopode 1 ; 6 dents minuscules, 1 longue et forte épine palmaire angulaire, une soie forte et courte, et 8 minces soies simples sur la marge ventrale du carpe du gnathopode 2 ; le propodite des péréiopodes 3 et 4 plus long que le carpe ; l'uropode 1 plus court que l'uropode 2 ; et enfin, la première épine sur la rame interne de l'uropode 1 plus grand que les trois épines suivantes.

Affiliations: 1: Kitakyushu Museum of Natural History and Human History, 2-4-1 Higashida, Yahatahigashi-ku, Kitakyushu 805-0071, Japan; 2: Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan


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