Coralliophilinae (Neogastropoda: Muricidae) from the southwest Pacific Oliverio, Marco Mémoires du Muséum national d'Histoire naturelle 2008 196 481 586 43LD5 Oliverio, 2008 Oliverio 2008 [272,465,1375,1398] Gastropoda Muricidae Mipus Animalia Neogastropoda 85 566 Mollusca species tonganus sp. nov.   TYPE MATERIAL. — Holotype(dd) MNHN 20244and 2 paratypes(dd) MNHN 20245-20246.  TYPELOCALITY. —  Tonga, 18°39’S, 173°54’W,  281 m[BORDAU 2: stn DW 1589]. MATERIAL EXAMINED. —   New Caledoniaproper. BATHUS 4: 1 dd ( paratype MNHN 20246, Fig. 196). stn DW 887, Passe de Duroc, 21°07’S, 164°28E, 320-344 m, 1  Tonga. BORDAU 2: stn DW 1589, 18°39’S, 173°54’W, 281 m, dd ( paratype MNHN20245, Fig. 195). 1 dd ( holotype MNHN20244, Fig. 137).   Fiji. BORDAU 1: stn CP 1506, 18°09’S, 178°37’W, 294-300 m, DISTRIBUTION. —  Knownonly from Tonga, Fijiand New Caledonia, empty shells in  281-320 m. DESCRIPTION. — Shell small for the genus, holotypeheight 11.9 mm, width 6.5 mm, of moderate thickness, turriculate, angled at periphery, whitish. Protoconch of 1.3 dome-shaped whorls, 680 Μm high, 780 Μm wide at base. Sculpture of small pustules scattered over entire surface. Two weak keels on final half-whorl, with a series of faint slightly opisthocline threads over each keel. Protoconch-teleoconch boundary slightly sinusigeral. Teleoconch of 4.8 whorls. Spire high, conical, constricted at base. Periphery keeled, subsutural ramp straight or sligthly convex, whorls convex below keel. Aperture of medium size, 3.5 x 2 mm. Outer lip broken in all specimens, seemingly incised at the position of the peripheral keel. Inner lip gently curved, thin. Siphonal canal long (30% of total height), open, straight. Umbilicus closed with low siphonal fasciole. Teleoconch axial sculpture of weak undulations on first whorl, 9 broad, rounded ribs on whorls 2-4 and 8 on the last whorl, and of squamous growth lines over entire shell. Spiral sculpture of cords, covered by densely packed imbricate scaly spines each corresponding to a growth line. Two spiral cords starting immediately on first teleoconch whorl, the abapical stronger, becoming cord of peripheral keel. Additional intermediate cordlets adjoining with growth, gradually increasing in size. Cords-cordlets on subsutural ramp (excluding peripheral cord) near the end of each whorl: 2-0 on the first whorl, 2-1 on the second whorl, 3-0 on the third whorl, 3-1 on the fourth whorl, 3-1 on the fifth whorl. Cords-cordlets visible below the peripheral cord near the end of each whorl: 1-0 on the first whorl, 1-0 on the second whorl, 1-1 on the third whorl, 2-0 on the fourth whorl. Last whorl with 16 cords and 3 cordlets below peripheral cords. Suture incised, canaliculate on last whorls, undulate. Animal and operculum unknown. REMARKS. — The new species is nearly identical in teleoconch characters to  Mipus sugitanii(Kosuge, 1985). It differs in its paucispiral protoconch, indicating a prolonged intracapsular, probably entirely lecithotrophic development. It also has a slightly shorter spire than  M. sugitanii, with fewer whorls at the same shell height. However, the holotypeof  M. sugitaniilacks its protoconch. Having tentatively referred material with a large protoconch to  M. sugitanii(see above),  M. tonganusis here described based on the material with the paucispiral protoconch. ETYMOLOGY. — The epithet  tonganusrefers to the Tongan archipelago, where the typematerial was collected. [242,1254,1479,1504] MNHN 85 566 MNHN 20244, MNHN 20245-20246 2 holotype [462,1125,1548,1573] Tonga 281 -18.65 Tonga 1274 -173.9 85 566 1 holotype [502,1254,1620,1643] MNHN New Caledonia New Caledonia 85 566 MNHN 20246 1 paratype [451,1274,1791,1816] Tonga, Fiji 301 Known 85 566 1