Mipus sugitanii Kosuge, 1985

Oliverio, Marco, 2008, Coralliophilinae (Neogastropoda: Muricidae) from the southwest Pacific, Mémoires du Muséum national d'Histoire naturelle 196, pp. 481-586 : 565-566

Mipus sugitanii Kosuge, 1985

Figs 135, 136, 194

Mipus sugitanii Kosuge, 1985: 47 , pl. 16, figs 6, 11-12.

FIGS 127-141. Teleoconchs of Mipus . 127, 128, M. isosceles (Barnard, 1959) , BORDAU 1 stn DW 1497, H 8.2 mm. 129, 130, M. boucheti n. sp., holotype MNHN 20239, MUSORSTOM 8 stn CP 1018, H 13.0 mm. 131, Flabellum pavoninum var. coalitum, MUSORSTOM 8 stn CP 1018, H 20 mm. 132, M. boucheti n. sp., paratype MNHN 20240, MUSORSTOM 8 stn DW 1016, H 12.6 mm. 133, M. matsumotoi Kosuge, 1985 , VOLSMAR stn DW 37, H 29.0 mm. 134, M. mamimarumai (Kosuge 1981) , MUSORSTOM 6 stn DW 468, H 13.2 mm. 135, 136, M. sugitanii Kosuge, 1985 . 135, BERYX 11 stn CP 22, H 22.2 mm; 136, VOLSMAR stn DW 38, H 11. mm. 137, M. tonganus n. sp., holotype MNHN 20244, BORDAU 2 stn DW 1589, H 11.9 mm; 138, 139, M. alis n. sp. 138, holotype MNHN 20241,BORDAU 2 stn DW 1631,H 16.8 mm; 139, paratype MNHN 20243,BORDAU 2 stn DW 1543,H 19 mm. 140, M. coriolisi Kosuge & Oliverio, 2004 , holotype MNHN 2210, MUSORSTOM 5 stn 341, H 22.7 mm. 141, M. tortuosus (Azuma, 1961) , MUSORSTOM 4 stn CP 201, H 42.2 mm.

TYPE MATERIAL. — Holotype TA 1930 , figured by Kosuge & Suzuki (1985: pl. 25, fig. 6) and Higo et al. (2001: 67 G2427).

TYPE LOCALITY. — Tosa Bay , “± 180 m ” (Higo et al. 1999: 218), Kōchi Prefecture, Shikoku, Japan .

MATERIAL EXAMINED. — Coral Sea. MUSORSTOM 5: stn 258, Loyalty Ridge. VOLSMAR: stn DW 38, 22°22’S, 168°44’E, 380- Banc Capel, 25°33’S, 159°46’E, 300 m, 4 dd; stn 255, 25° 15’S, 420 m, 1 dd (Fig. 136). — MUSORSTOM 6: stn DW 459, 21°01’S, 159°55’E, 280-295 m, 1 dd; stn 296, 23°13’S, 159°36’E, 278 m, 167°31’E, 425 m, 1 lv.

2 dd. Vanuatu. MUSORSTOM 8: stn DW 978, 19°23’S, 169°27’E, 408- New Caledonia proper. BATHUS 2: stn DW 724, Ile des Pins, 413 m, 1 dd.

22°48’S, 167°26’E, 344-358 m, 2 dd; stn DW 730, 23°03’S, Fiji. BORDAU 1: stn DW 1417, 16°27’E, 178°55’W, 353 m, 1 dd; 166°58’E, 397-400 m, 2 dd. stn DW 1497, 18°44’E, 178°25’W, 335-350 m, 1 dd.

Norfolk Ridge. CHALCAL 2: stn DW 69, 24°44’S, 168°08’E, 260 Tonga. BORDAU 2: stn DW 1607, 22°15’S, 175°23’W, 356-367 m, 1 dd (Fig. 194) . — BERYX 11: stn CP 22, 22°44’S, 168°07’E, m, 1 dd; stn DW 1628, 23°22’S, 176°18’W, 400-416 m, 3 dd, 1 490-510 m, 1 dd (Fig. 135). — BATHUS 3: stn DW 827, Banc Ju- dd juv; stn DW 1634, 21°45’S, 175°20’W, 321-322 m, 1 dd; stn meau Ouest, 23°22’S, 168°01’E, 381-469 m, 1 dd; stn DW 829, DW 1635, 21°44’S, 175°20’W, 320-323 m, 1 dd .

23°21’S, 168°02’E, 386-390 m, 1 dd.

DISTRIBUTION. — Pacific : Japan “from Kii Peniunsula to Tosa Bay in 150-200 m deep” (Tsuchiya 2000). Coral Sea, New Caledonia, Norfolk Ridge, Loyalty Ridge, Vanuatu, Fiji and Tonga, empty shells in 260-490 m, live in 425 m. First record in the southwest Pacific .

REMARKS. — The holotype of Mipus sugitanii lacks the protoconch. There are two species in the southwest Pacific with almost identical teleoconchs but that differ in their protoconchs. The holotype of M. sugitanii could belong to either of these species. I provisionally refer all the present material, with the more common, planktotrophic type of development, to M. sugitanii , pending resolution of this issue. The other species, with a paucispiral protoconch, is M. tonganus n. sp. (described below). Multispiral protoconch of 2.8 conical whorls, 720 Μm high, 710 Μm wide at the base. Protoconch-I of about 0.8 whorls, sculptured with pustules over the entire surface. Protoconch-II of about 2 whorls, with 2 spiral keels, and sculptured with a series of subsutural threads and a series of similar threads over each keel; a diffuse granulation is present in the interspaces, with granules often fused to give rise to a series of prosocline threadlets between the second abapical keel and the suture.