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 Southern New Caledonia morph (“ pupiform ”) Figs 2 (as sNC), 6, 7F Material examined Sequenced material 26 sequenced specimens (all MNHN ) ( Table 1 ). Not sequenced material SOUTHERN NEW CALEDONIA • Material listed by Kilburn & Bouchet (1988) • 1 dd; Île des Pins; 22°48′ S , 167°15′ E ; 440–470 m deep; TERRASSES; stn CP3115 • 1 dd; SW of Île des Pins; 22°54′ S , 167°17′ E ; 496–505 m deep; KANACONO; stn DW4722 • 2 dd; W of Île des Pins; 22°50′ S , 167°16′ S ; 480–505 m deep; VAUBAN 1978–1979 ; stn DR23 • 5 lv , 1 dd, S of Île des Pins; 22°53′ S , 167°17′ E ; 570–610 m deep; BIOCAL; stn DW 46 • 1 dd; S of Grande Terre; 22°56′ S , 167°17′ E ; 485–520 m deep; MUSORSTOM 4; stn CP215 • 1 dd; S of Grande Terre; 22°56′ S , 167°17′ E ; 485–520 m deep; MUSORSTOM 4; stn DW223 • 2 worn dd; 22°51′ S , 167°13′ E ; 445–460 m deep; MUSORSTOM 4; stn DW229 • 2 dd; S of Île des Pins; 22°52′ S , 167°13′ E ; 415 m deep; SMIB 1; stn DW02 • 7 dd; S of Île des Pins; 22°55′ S , 167°16′ E ; 490–495 m deep; SMIB 2; stn DW10 • 1 dd; Banc Éponge; 24°54′ S , 168°22′ E ; 530 m deep; SMIB 3; stn CP04; • 1 worn dd; Kaimon Maru Bank; 24°45′ S , 168°08′ E ; 233 m deep; SMIB 3; stn DW08 • 1 lv ; SW of Île des Pins; 22°59′ S , 167°19′ E ; 525 m deep; SMIB 3; stn DW21 • 1 lv , 1 dd; SW of Île des Pins; 23°03′ S , 167°19′ E ; 503 m deep; SMIB 3; stn DW22. Remarks A very peculiar morph with medium-sized shell (SL up to 53.7 mm , usually less than 35 mm ), occurring only in southern New Caledonia , mostly off Île des Pins, with a few specimens collected on Norfolk Ridge. Despite morphological similarity between specimens, these are genetically heterogeneous, belonging to different highly divergent assemblagies of haplotypes (marked by yellow in Fig. 3 ), some being closer to specimens from northern New Caledonia and the Coral Sea, while others constituting a subclade on the tree ( Fig. 2 ). In total eight haplotypes were identified within this morph. Fig. 6. Amalda hilgendorfi (von Martens, 1897 ) . Southern New Caledonia morph. A–D and E–H belong to two molecularly distinct subclades. A–B . MNHN IM-2007-43664, SL 30.6 mm. C . MNHN IM-2007-43673, SL 34.2 mm. D . MNHN IM-2009-11964, SL 15.2 mm. E–F . MNHN IM-2007-43671, SL 33.8 mm. G . MNHN IM-2007-43674, SL 34.7 mm. H . MNHN IM-2009-11945, SL 31.6 mm. I . Norfolk Ridge, Banc Éponge, NORFOLK 1, stn DW 1693, 24°55′ S, 168°21′ E, 564–1144 m, SL 61 mm, specimen not sequenced, shell not to scale. Shells (except I, reduced) at the same scale. Shell shape pupiform due to very strong development of primary and secondary calluses on upper teleoconch whorls, while uppermost 2.5–3 whorls (including those of protoconch) remain uncovered, revealing the papillate apex. Except the large development of the callus, the shell shape is rather similar to those in the north New Caledonia morph and some specimens with less developed callus (e.g., MNHN IM-2013-69558 or MNHN IM-2007-43673 on Fig. 6C ) are practically indistinguishable (e.g., MNHN IM-2009-11918, Fig. 5I ). Columellar ridges rather distinct, 6–7. Upper anterior band usually evenly convex, not subdivided by a ridge. First protoconch whorl diameter 0.84–0.90 mm (mean 0.86, n= 5). Depth range 233– 610 m . On Norfolk Ridge and off southern New Caledonia , some specimens very similar to those from north of New Caledonia were found in deeper water in 560–650 m in addition to the pupiform morph. One specimen was collected on Banc Eponge ( Fig. 6I ) in a haul with a very large depth range, 564–1144 m , but the deepest record needs confirmation. Although none of these specimens were sequenced, there is no doubt of their identity.