Diversity of Coralliophilinae (Mollusca, Neogastropoda, Muricidae) at Austral Islands (South Pacific) Author Oliverio, Marco Dipartimento di Biologia Animale e dell’Uomo, Rome University, “ La Sapienza ”, Viale dell’Università 32, I- 00185 Rome (Italy) marco. oliverio @ uniroma 1. it text Zoosystema 2009 2009-12-31 31 4 759 789 http://www.bioone.org/doi/abs/10.5252/z2009n4a2 journal article 8158 10.5252/z2009n4a2 e6fe093f-6002-4668-ae64-b656f2f7acfc 1638-9387 4520186 Rapa sp. cf. R. incurva ( Dunker, 1852 ) ( Figs 11 C-E; 12E) Bulbus incurvus Dunker, 1852: 126 . TYPE MATERIAL. — Rapa incurva : Holotype ( ZMB 103.967 ). TYPE LOCALITY. — Bulbus incurvus : Uncertain : “ China ?” [no locality given on label of the holotype ]. MATERIAL EXAMINED. — The type material of R. incurva and: Banc Président Thiers, BENTHAUS, stn DW 1926, 24°38.2’S , 146°00.8’W , 50-90 m , 1 juv dd, 1 juv lv ( Figs 11 C-E; 12E). DISTRIBUTION. — Rapa incurva : Pacific Ocean,from the Kii Peninsula, Japan , “intertidal to 20 m , in base of soft corals” ( Higo et al. 1999: 221 ). From New Caledonia and Loyalty Islands , empty shells in 20 m , alive in 17- 31 m . FIG. 11. — A , Leptoconchus lamarckii Deshayes, 1863 , N of Raivavae, BENTHAUS, stn DW 1943, 23°48.7’S, 147°39.1’W, 950 m; B , Leptoconchus sp. [ peronii ( Lamarck, 1818 ) group], Marotiri Is., BENTHAUS, stn DW 1888, 27°51.4’S, 143°31.4’W, 120-100 m; C -E , Rapa sp. cf. R. incurva ( Dunker, 1852 ) , Banc Président Thiers, BENTHAUS, stn DW 1926, 24°38.2’S, 146°00.8’W, 50-90 m; F , G , Magilus antiquus ( Montfort, 1810 ) , Hiri Bay, ATELIER RAPA 2002 , stn 9, 27°37.3’S, 144°22.2’W, 3-24 m (inside the faviid coral). Scale bars: A, 10 mm; B-E, 5 mm; F, 30 mm; G, 20 mm. REMARKS Protoconch of 3.7 whorls, 710 µm high and 730 µm wide at the base. Protoconch I of 0.8 whorls covered by pustules. Protoconch II of about 2.9 whorls, with 2 major spiral keels (the abapical starting on the early second protoconch whorl, the adapical starting at the end of the second protoconch whorl), and one minor subsutural keel, sculptured with a series of threads over each keel. Spiral microsculpture evident on the keels.The specimens of the present material, are somehow different from juveniles of Rapa incurva in having a more spherical shape. It is possible, similarly to what happens in Leptoconchus , that also Rapa includes cryptic species of difficult morphological interpretation.