Macrobrachium feunteuni Keith & Vigneux, 2002

Mazancourt, Valentin De, Marquet, Gerard, Wowor, Daisy & Keith, Philippe, 2024, Macrobrachium ngankeeae, a new species of freshwater shrimp (Crustacea: Decapoda: Palaemonidae) from Papua Barat Province, Indonesia, Zootaxa 5476 (1), pp. 253-266 : 259-260

Macrobrachium feunteuni Keith & Vigneux, 2002

Macrobrachium feunteuni Keith & Vigneux, 2002: 130 , fig. 25–33.

Type material. Holotype: male (cl 11.9 mm), MNHN-IU-2014-22831 (formerly MNHN-Na 13767), Marquesas Islands, Nuku Hiva, Hakaui R., coll. P. Keith, E. Vigneux, E. Feunteun, B. Cressens, 10 February 2000 . Paratypes: 1 male (cl 12.9 mm), 1 female (cl 9.8 mm), MNHN-IU-2014-22832 (formerly MNHN-Na 13768), data same as holotype ; 1 male (cl 10.2 mm), 4 females (cl 11.3–13.3 mm), MNHN-IU-2014-22833 (formerly MNHN-Na 13769), Marquesas Islands, Hiva-Oa, Vaioa R., coll. P. Keith, E. Vigneux, E. Feunteun, B. Cressens, 13 February 2000 .

Other material examined. M ARQUESAS ISLANDS: Hiva Oa : 1 male (cl 5.8 mm), 1 ovigerous female (cl 8.4 mm), MNHN-IU-2019-473, Taakaoa R., 09°48.100’S 139°01.761’W, 90 m asl, coll. E. Feunteun, P. Gerbeaux, G. Marquet, P. Tiberghien, 10 October 2017 ; 1 male (cl 7.4 mm), 1 female (cl 9.1 mm), 3 ovigerous females (cl 5.7–9.1 mm), MNHN-IU-2018-2981, Faakooa R., 09°48.097’S 139°01.768’W, 5 m asl, coll. E. Feunteun, P. Gerbeaux, G. Marquet, P. Tiberghien, 10 October 2017 ; 1 male (cl 8.3 mm, MNHN-IU-2019-161), 1 male (cl 9.3 mm; MNHNIU-2019-161; CA2437 ), Hanarapa R., 09°44.355’S 139°00.104’W, 110 m asl, coll. E. Feunteun, P. Gerbeaux, G. Marquet, P. Tiberghien, 11 October 2017 . Nuku-Hiva : 1 ovigerous female (cl 5.2 mm), MNHN-IU-2016-11879, Haitepeu R., coll. P. Keith, E. Vigneux, E. Feunteun, B. Cressens, 9 February 2000 ; 1 ovigerous female (cl 9.5 mm), MNHN-IU-2016-11889 (formerly MNHN-Na 17389), Hakaui R., coll. P. Keith, E. Vigneux, E. Feunteun, B. Cressens, 10 February 2000 ; 1 male (cl 7.3 mm), 1 ovigerous female (cl 8.7 mm), MNHN-IU-2018-2994, Taipivai R., 08°51.126’S 140°06.066’W, 130 m asl, coll. E. Feunteun, P. Keith, G. Marquet, 18 October 2017 . Tahuata : 1 male (cl 5.0 mm), MNHN-IU-2016-11891 (formerly MNHN-Na 17461), Hamatetena R., coll. P. Keith, E. Vigneux, E. Feunteun, B. Cressens, 16 February 2000 .

Diagnosis. Medium-sized species with subcylindrical body form. Rostrum short, reach distal end of second article of antennular peduncle; slender; dorsal carina flat, straight, with total 9–11 teeth, 6 or 7 teeth completely postorbital; ventral carina convex with 1 or 2 teeth. Carapace glabrous. Ocular beak moderately developed. Second pereiopods robust, dissimilar in shape, unequal in size; distal part of dactylus and pollex of major second pereiopod with double row of tubercles each, fingers slightly shorter than palm, carpus conical, carpus shorter than chela, carpus slightly longer to about as long as palm, carpus longer than merus; cutting edges of minor second pereiopod gaping, densely covered with long stiff setae concealing surface; all articles covered with modified squamiform and long blunt mamilliform setae. Third, fourth and fifth pereiopods with modified squamiform setae and few scattered short stiff setae. T4 without median process. Pre-anal carina well developed. Uropods glabrous, exopod with mobile mesial spine longer than distolateral tooth. Developed eggs small, maximum size 0.6 × 0.5 mm, ovoid, numerous.

Distribution. So far M. feunteuni is only encountered in three islands of Marquesas Islands, French Polynesia.