A rare and unusual new bittiine genus with two new species from the South Pacific (Cerithiidae, Gastropoda)

Shell and operculum morphology of Limatium aureum sp. n. (A–H, K, L, N) and Limatium sp. (I, J, M). Limatium aureum sp. n.: A Holotype, MNHN IM-2013-42460. Austral Islands, Maria B Austral Islands, Pointe Kauira, RAPA 2002 stn. 36 (MNHN IM-2014-6920) C New Caledonia, CORAIL 2 stn. DW26 (MNHN IM-2014-6921) D Tonga, between Eua and Tongatapu, BORDAU 2, stn. DW1512 (MNHN IM-2014-6922) E Austral Islands, NW of Tauna Islet, RAPA 2002 stn. 44 (MNHN IM-2014-6923) F New Caledonia, Grand Récif Aboré off Nouméa, MONTROUZIER stn. 1352 (MNHN IM-2014-6924). G Loyalty Islands, LIFOU 2000 stn. 1423 (MNHN IM-2014-6925) H Loyalty Islands, LIFOU 2000 stn. 1418 (MNHN IM-2014-6926) K Protoconch, New Caledonia, Grand Récif Aboré off Nouméa, MONTROUZIER stn. 1352 (MNHN IM-2014-6927) L Protoconch, Austral Islands, SE of Tauna Islet, RAPA 2002 stn. 8 (MNHN IM-2014-6928) N Operculum, Austral Islands, Pointe Kauira, RAPA 2002 stn. 36 (MNHN IM-2014-6829) (same as in 3B). Limatium sp.: I Philippines, W of Mindoro, MUSORSTOM 3 stn. DR117 (MNHN IM-2014-6830) J Vanuatu, Santo, W of Tutuba, SANTO 2006 stn. DS103 (MNHN IM-2014-6831) M Protoconch, Vanuatu, Santo, West of Tutuba I., SANTO 2006 stn. DS103 (MNHN IM-2014-6832) (same as in 3J). Scale bars: 5 mm (A–J); 100 µm (K–M); 500 µm (N).