The Indo-Pacific Amalda (Neogastropoda, Olivoidea, Ancillariidae) revisited with molecular data, with special emphasis on New Caledonia Author Kantor, Yuri I. 48F89A50-4CAC-4143-9D8B-73BA82735EC9 Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninski Prospect 33, 119071 Moscow. kantor.yuri1956@gmail.com Author Castelin, Magalie 9464EC90-738D-4795-AAD2-9C6D0FA2F29D Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205 (CNRS, EPHE, MNHN, UPMC), Muséum national d’histoire naturelle, Sorbonne Universités, 43 Rue Cuvier, 75231 Paris Cedex 05, France. magalie.castelin@mnhn.fr Author Fedosov, Alexander 40BCE11C-D138-4525-A7BB-97F594041BCE Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninski Prospect 33, 119071 Moscow. fedosovalexander@gmail.com Author Bouchet, Philippe FC9098A4-8374-4A9A-AD34-475E3AAF963A Institut de Systématique, Évolution, Biodiversité, ISYEB, UMR 7205 (CNRS, EPHE, MNHN, UPMC), Muséum national d’histoire naturelle, Sorbonne Universités, 43 Rue Cuvier, 75231 Paris Cedex 05, France. philippe.bouchet@mnhn.fr text European Journal of Taxonomy 2020 2020-08-21 706 1 59 journal article 10.5852/ejt.2020.706 269e39e4-19ff-4a70-9376-8b7eaf09f663 2118-9773 4010954 C4C4D130-1EA7-48AA-A664-391DBC59C484 Amalda monilifera ( Reeve, 1864 ) Figs 19 F–G, 20B, E Ancillaria monilifera Reeve, 1864 : pl. 10, sp. 36. Gracilispira monilifera – Wilson 1994: 131 , pl. 29, fig. 16 a–c. Amalda ( Gracilispira ) monilifera – Gratecap 2016a: 6 , 18, fig. 12. Type material Holotype (by monotypy) WESTERN AUSTRALIA • Swan River ; NHMUK 197933 . Material examined One sequenced specimen ( Table 1 ). Description MEASUREMENTS. Shell small (SL up to 18 mm ). SHELL. Ovate-fusiform, with conical spire with nearly straight sides. Primary spire callus thin, semitransparent, smooth, covering all whorls, except protoconch. Protoconch rounded above, boundary with teleoconch indistinct, first whorl diameter 0.65 mm . Secondary callus medium thick on parietal wall and forming distinct parietal pad, extending only to penultimate whorl. Plication plate with 3 weak ridges and still two weaker on columella. Olivoid groove distinct but shallow, labral denticle prominent, narrow triangular. Upper anterior band weakly convex, with low median ridge, lower anterior band nearly flat, smooth. Colour of primary callus light orange, body whorl cloak creamy with light brown anastomosing pattern, subsuturally a row of large, irregular oval brown spots, seen through transparent callus on all teleoconch whorls, olivoid band and lower anterior band with row of brown spots, plication plate creamy. RADULA (n= 1, Fig. 20B, E ). With broad, subtriangular lateral teeth with sharp, hook-shaped, curved tip. Central cusp multicuspid, with three major central cusps, median much narrower and slightly shorter than lateral ones, in addition medium long, irregularly shaped, 2–4 cusps between lateral and median cusps, also irregular-shaped fissures in median part of central tooth. Lateral flaps of central tooth dentated, with 3–5 triangular short cusplets. Remarks The radula of the species is studied here for the first time. Fig. 19. Sequenced species of Amalda H. Adams & A. Adams, 1853 . A–B . Amalda sp., MNHN IM-2013-63891, SL 20 mm. C–D . A. contusa ( Reeve, 1864 ) , MNHN IM-2009-22263, SL 24.9 mm. E . A. optima (G.B. Sowerby III, 1897 ), MNHN IM-2007-38287. F–G . A. monilifera ( Reeve, 1864 ) , MNHN IM - 2013-63898, SL 11.7 mm. H–I . A. hinomotoensis ( Yokoyama, 1922 ) , MNHN IM-2019-618, SL41.4 mm. J–K . A.hayashii Ninomiya, 1988 , MNHN IM-2013-44413,SL38.4 mm. L–M . A.bellonarum Kilburn & Bouchet, 1988 , MNHN IM-2007-33273. Shells not to scale. Ninomiya (1990) included this species in his new subgenus Mundaspira ( type species Amalda concinna Ninomiya, 1990 ). Distribution The Recherche Archipelago in southern Western Australia ( Gratecap 2016a ), in 0– 15 m .