A revision of the Chilodontidae (Gastropoda: Vetigastropoda: Seguenzioidea) of southern Africa and the south-western Indian Ocean Herbert, D. G. African Invertebrates 2012 2012-11-06 53 2 381 381 5ZDNR 479457 (McLean, 1984) Herbert 2012 McLean 1984 [339,799,941,967] Gastropoda Chilodontaidae Clypeostoma true Animalia Seguenziida 28 409 Mollusca species nortoni comb. nov.   Figs 8, 12H–L  Agathodonta nortoni: McLean 1984: 122, figs 1–3; Tsuchida & Kurozumi 1996: 37, fig. 3; Vilvens 2001: figs 11–13; Vilvens & Héros 2003: figs 12, 13; Poppe et al. 2006: 30, pl. 7, figs 3, 4; Poppe & Tagaro 2008: 166, pl. 28, figs 4, 6. Typeloc.: off Baltazar Is. ( 13°14'N 121°49'E), Marinduque Province, Philippines. A number of  Clypeostomashells resembling  C. nortonihave been dredged off Madagascarand obtained ex piscibusfrom the SofalaBank, off central Mozambique. Similar material evidently also occurs off Réunionand was recorded there by Jay (2009as  Clanculus ceylonicus). Compared with  C. meteorae, these specimens are consistently larger (mature length 9.6–14.6 mm) and have a larger protoconch (diameter 310–320 µm). In addition, the basal callus shield is more extensive and smoother, bearing (apart from 3–5 strong, in-running parietal ridges overlying the basal sculpture of the previous whorl) only traces of superficial ridging in the parietal region and a small number of granules associated with the medial columella area.  C. townsendianum( Fig. 12F, G), from the Persian Gulf, is of a similar size (figured syntype, length 10.4 mm), but has stronger apertural dentition more similar to that of  C. meteorae. The form of the apertural dentition in the present material is closest to that of the Philippine  C. nortoni, but the shell attains a relatively larger size (length up to 14.6 mm) than does  C. nortoni, and the suture is slightly less indented and the whorls thus less convex. With the limited amount of material available and the geographical distances involved, it is difficult to assess the significance of these differences. I cannot thus confidently identify this material as  C. nortoni, but rather draw attention to its existence and its similarity to that species.  Fig.12.  Clypeostomaspecies:(A, B)  C. meteorae( Neubert, 1998), SW of Cap d’Ambre,Antsiranana, northern Madagascar, length 6.9 mm (MNHN); (C–E)  C. meteorae, small specimen, off Mahajamba Bay, northern Madagascar, length 5.6 mm (MNHN); (F, G)  Euchelus townsendianusMelvill & Standen, 1903, figured syntype, length 10.4 mm (NHMUK 1903.12.15.119); (H, I)  C.cf. nortoni(McLean, 1984), west of Nosy Be, northern Madagascar, length 9.6 mm (MNHN); (J–L)  C.cf. nortoni, large specimen, Sofala Bank, central Mozambique, length 14.6 mm (J. Rosado coll’n).   Materialexamined: MADAGASCAR: West of Nosy Be( 13.400°S 47.967°E), -  210–310 m, Campagne Miriky, st’n DW3232, dredged,  03.vii.2009( MNHN); south of Faux-Cap( 26.133°S 45.650°E), -  280–333m, Exped’n ATIMO VATAE, st’n DW3553, dredged  Nosy Be11,  5.v.2010( MNHN); ditto ( 26.117°S 45.650°E), -  264–280 m, Exped’n ATIMO VATAE, st’n DW3552, dredged  Nosy Be11,  5.v.2010( MNHN).  MOZAMBIQUE: Between Beiraand Bazaruto, Sofala Bank( 20.123°S 35.543°E), -  90–145 m, ex pisce, J. Rosado2005–2008 ( J. Rosadocoll’n). 2009-07-03 MNHN Campagne Miriky Madagascar 260 -13.4 West of Nosy Be 77 47.967 Material 29 410 1 2010-05-05 MNHN Exped'n & Nosy Be Madagascar 307 -26.133 Faux-Cap 74 45.65 29 410 1 2010-05-05 MNHN Exped'n & Nosy Be Madagascar 272 -26.117 Faux-Cap 74 45.65 29 410 1 J. Rosado Mozambique Between Beira 118 -20.123 Bank 76 35.543 Bazaruto 29 410 1 Sofala