Distribution & Ecology: Endemic to the region; Marquesas (Eiao, Hiva Oa, Nuku Hiva, Ua Pou) - Marine; Deep 86-120 to 280-370 m; ?Hard bottom.

Regional Records: Parathranites hexagonum - Poupin, 1996: 36, 1996: 98 (Checklist) [Not P. hexagonum Rathbun, 1906, in part, specimen from Eiao only; see Crosnier, 2002]. - Parathranites tuberosus Crosnier, 2002: 808, fig. 4d, 5a, 6, 8a (Material examined; coll. Frv Marara, fr: SMSRB, Eiao, MARARA stn D74, 7°59,81’S, 140°45,23’W, dragage, 155 m, 19.I.1991, J. Poupin coll., 1 sp. 18 × 29 mm (MNHN-B 28427). MUSORSTOM 9, Ua Pou, stn DW 1145, 9°19,0’S, 140°06,3’W, 150-180 m, 22.VIII.1997, 2 juv. dont un 5,5 × 7,6 mm (MNHN-B 27756). - Eiao, stn CP 1159, 7°58,3’S, 140°43,7’W, 145 m, 23.VIII.1997, 1 sp. 13,8 × 22,4 mm (MNHN-B 28428). - Nuku Hiva, stn DW 1164, 8°57,7’S, 140°05,7’W, 170- 180 m, 24.VIII.1997, 1 sp. 7,1 × 11,5 mm (MNHNB 28431). - Stn 1183, 8°45,5’S, 140°03,8’W, 86-120 m, 26.VIII.1997, 1 sp. 10,2 × 16,0 mm (MNHN-B 28432). - Hiva Oa, stn DW 1208, 9°48,9’S, 139°09,5’W, 117 m, 28.VIII.1997, 3 juv. ; 2 sp.. 7,2 × 11,2 mm et 7,3 × 11,5 mm (MNHN-B 28433). - Stn DW 1218, 9°44,5’S, 138°50,9’W, 125-135 m, 30.VIII.1997, 3 juv. ; 1 sp. abîmé (Lc = 10,1 mm) (MNHN-B 28444). - Stn DW 1224, 9°44,6’S, 138°51,1’W, 115-120 m, 30.VIII.1997, 1 juv. (MNHN-B 28445). - Stn DW 1235, 9°41,8’S, 139°03,5’W, 105-285 m, 31.VIII.1997, 2 juv. (MNHN-B 28436). - Stn DW 1236, 250- 400 m, 1 juv. (MNHN-B 28437). - Stn CP 1237, 9°41,9’S, 139°03,6’W, 95-305 m, 31.VIII.1997, 3 juv. ; 7 sp.. 7,5 × 11,6 mm à 18,2 × 30,2 mm ; 5 sp. 9,7 × 16,5 mm à 18,1 × 28,7 mm (MNHN-B 28429). - Stn CP 1238, 9°41,4’S, 139°03,8’W, 280- 370 m, 31.VIII.1997, 1 sp. 16,2 × 25,8 mm (MNHNB 27755) ; 12 juv. ; 6 sp.. 9,7 × 16,0 mm à 18,0 × 29,5 mm ; 12 sp. 9,8 × 16,0 mm à 18,0 × 28,9 mm ; 4 sp. ov. 12,5 × 20,3 mm à 16,2 × 26,0 mm (MNHN-B 28430). - Deep 86-120 to 280-370 m.

Depth distribution: 120 - 370 m