Amussium investigatoris Smith, 1906: 255 New species and new records of deep-water Pectinoidea (Bivalvia: Propeamussiidae, Entoliidae and Pectinidae) from the South Pacific Dijkstra, Henk H. Maestrati, Philippe Mémoires du Muséum national d'Histoire naturelle 2008 196 77 114 4MTLT (Smith, 1906) Smith 1906 [272,786,890,914] Bivalvia Propeamussiidae Propeamussium Animalia Pectinida 5 82 Mollusca species investigatoris    Amussium investigatorisSmith, 1906: 255.  MATERIAL EXAMINED. — The typematerial (see Dijkstra & 500 m, 7 spms; stn DW 1486, 19˚01’S, 178˚26’W, 395-540 m, Kastoro 1997: 250). 2 spms, 2 lv.  Solomon. SALOMON 1: stn CP 1792, 09°15’S, 160°09’E, 477-  Tonga.BORDAU 2: stn DW 1520, 21˚25’S, 175˚03’W, 447- 505 m, 1 rv; stn CP 1795, 09°19’S, 160°23’E, 442-451 m, 1 rv; 450 m, 9 lv, 7 rv; stn CP 1528, 21˚14’S, 174˚59’W, 587-592 m, 8 stn CP 1805, 09°35’S, 160°43’E, 367-500 m, 1 spm; stn DW spms; stn CP 1529, 21˚13’S, 174˚58’W, 688-710 m, 2 spms; stn 1817, 09°48’S, 160°54’E, 233-269 m, 1 rv; stn CP 1836, 10°10’S, CP 1566, 21˚02’S, 175˚18’W, 530-531 m, 2 spms; stn DW 1617, 161°22’E, 439-486 m, 1 spm; stn CP 1837, 10°13’S, 161°29’E, 23˚03’S, 175˚53’W, 483-531 m, 2 lv; stn DW 1618, 24˚13’S, 381-383 m, 1 lv. 176˚18’W, 627-656 m, 1 lv; stn DW 1619, 24˚16’S, 176˚20’W,   Fiji. MUSORSTOM 10: stn DW 1315, 17˚16’S, 178˚24’E, 480- 591- 593 m, 1 lv; stn DW 1632, 22˚01’S, 175˚42’W, 613-618 m, 500 m, 2 lv, 1 rv; stn CP 1316, 17˚15’S, 178˚22’E, 478-491 m, 254 1 rv; stn DW 1637, 21˚05’S, 175˚23’W, 464-507 m, 1 spm, 6 lv, spms; stn CP 1317, 17˚12’S, 178˚14’E, 471-475 m, 8 spms; stn 6 rv; stn CP 1638, 21˚05’S, 175˚23’W, 469-520 m, 19 spms; stn CP 1330, 17˚10’S, 177˚56’E, 567-699 m, 9 spms; stn DW 1376, CP 1640, 21˚09’S, 175˚24’W, 564-569 m, 58 spms, 6 lv; stn CP 18˚19’S, 178˚09’E, 497-504 m, 1 lv. — BORDAU 1: stn CP 1420, 1641, 21˚09’S, 175˚22’W, 395 m, 2 spms; stn CP 1642, 21˚05’S, 17˚05’S, 178˚57’W, 550-687 m, 2 spms; stn DW 1432, 17˚20’S, 175˚23’W, 532 m, 44 spms, 7 lv, 9 rv; stn CP 1643, 21˚05’S, 178˚44’W, 477-493 m, 1 spm, 4 lv, 2 rv; stn CP 1461, 18˚09’S, 175˚22’W, 487 m, 2 spms; stn CP 1644, 21˚05’S, 175˚23’W, 178˚48’W, 560 m, 1 spm; stn CP 1462, 18˚09’S, 178˚44’W, 501 m, 6 spms, 3 lv, 1 rv.  556-560 m, 2 spms, 1 lv; stn CP 1468, 18˚16’S, 178˚41’W, 478- DISTRIBUTION. —  Northern Indian Ocean, Indonesia( Dijkstra& Kastoro1997: 250), Chesterfield Islands, New Caledonia, Loyalty Islands, Norfolk Islandand Kermadec Islands( Dijkstra 2001: 76); live in  176-660 m. New records for the Solomon Islands, Fijiand Tonga. Present material live in  395-688 m. REMARKS. — The present material is similar to the typespecimens, although the radial sculpture on the left valve is somewhat weaker with fewer radial riblets in the present material. The present material has a few more internal ribs (12 and usually with 1-3 rudimentary interstitial riblets) than the typespecimens (10 with 1 or 2 rudimentary interstitial riblets). Dijkstra & Kastoro & Chesterfield Islands & Kermadec Islands Indonesia 418 Northern Indian Ocean 5 82 1 Province des Iles