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. 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. 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. 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. 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 21031 10.5852/ejt.2020.706 269e39e4-19ff-4a70-9376-8b7eaf09f663 4010954 C4C4D130-1EA7-48AA-A664-391DBC59C484 Amalda allaryi Bozzetti, 2007 Figs 13G , 16 A–F, 17A–B Amalda allaryi Bozzetti, 2007: 14 , text-fig. Amalda maritzae Bozzetti, 2007: 15–16 , text-fig [possible synonym; see Remarks]. Amalda allaryi – Gratecap 2014: 14 , 19, figs 26–27. Type material Holotype NEW CALEDONIA • Holotype of A. allaryi ; Île des Pins; 250–280 m deep; MNHN IM-2000-20532 • Holotype of A. maritzae ; “Norol Récifs” [but see below]; 250–280 m deep; MNHN IM-2000-24475 . Material examined Sequenced material 3 sequenced specimens ( Table 1 ). Not sequenced material NEW CALEDONIA • 2 dd; Grand Récif Sud ; 22°44′ S , 167°19′ E ; 95–100 m deep; LAGON; stn DW580 • 3 dd; Canal de la Havannah ; 22°13′ S , 167°07′ E ; 264–273 m deep; EXBODI; stn CP3788 • 4 dd; Terrasses Sud Est ; 22°28′ S , 167°29′ E ; 300–420 m deep; TERRASSES, stn DW3079 • 3 dd; Terrasses Sud Est ; 22°06′ S , 167°03′ E ; 190–200 m deep; EXBODI; stn DW3093 • 1 dd; W of Île des Pins ; 22°40′ S , 167°12′ E ; 219–244 m deep; KANACONO; stn CP4656 • 1 dd; W of Île des Pins ; 22°41′ S , 167°02′ E ; 120–129 m deep; KANACONO; stn DW4727 • 1 dd; S of Île des Pins ; 22°47′ S , 167°27′ E ; 244–285 m deep; KANACONO; stn CP4673 • 2 dd; W of Île des Pins ; 22°42′ S , 167°13′ E ; 303–315 m deep; KANACONO; stn CP4658 • 1 dd; E of Île des Pins ; 22°41′ S , 167°41′ E ; 358– 393 m deep; KANACONO; stn CP4739 • 1 dd; W of Île des Pins ; 22°41′ S , 167°13′ E ; 225–250 m deep; KANACONO; stn DW4701 • 5 dd; 1 lv ( MNHN IM-2013-68272); SW of Île des Pins ; 22°47′ S , 167°27′ E ; 200–290 m deep; KANACONO; stn DW4695 • 13 dd; S of Île des Pins ; 22°48′ S , 167°29′ E ; 311– 302 m deep; KANACONO; stn CP4674 . Description SHELL. Large (SL up to 65 mm ), ovate-fusiform, with a cyrtoconoid spire. Primary spire callus thick, weakly microshagreened, covering all whorls, except 1–1.5 protoconch whorls, thus rendering impossible the whorls count and measurements. First protoconch whorl diameter 0.84–1.02 mm (mean 0.92, n =3). Secondary callus thick, fusing without visible border with parietal callus, with distinct anterior border and reaching anterpenultimate whorl. Plication plate with 2–3 ridges, lowest one the weakest, columella smooth. Olivoid groove very shallow, nearly obsolete, labral denticle very small, obtuse. Upper anterior band weakly convex, rear edge of anterior plate distinctly thickened, raised above the surface of upper anterior band, nearly flat. Lower anterior band nearly flat, smooth. Colour from very pale creamy to ivory. Primary callus from light to dark orange or brown, with strongly prosocline lighter axial lines. Secondary callus orange in upper part. Olivoid band slightly lighter than body whorl cloak, upper anterior band of the same colour as cloak, lower anterior band and plication plate white. RADULA (MNHN IM-2013-68272, Fig. 13G ). Central tooth tricuspid, with central cusp slightly narrower and shorter than lateral ones. Cusps smooth, broad lateral flaps strongly serrated and with shallow longitudinal grooves between cusplets. 0–2 additional small cusplets between central and lateral major cusps. Remarks Amalda allaryi is very similar to coloured specimens of A. montrouzieri , with which it can be sympatric where they bathymetrically overlap. The morphological differences between the two are very subtle and include the generally more obtuse shell apex in A. allaryi , reflecting its larger protoconch ( Fig. 17 A–B), and a more brightly coloured callus, which can be orange-pink (as in our studied specimens) with narrow, dense, strongly prosocline lighter axial lines. In the holotype , though, the callus is much paler, light yellowish-brown. Nevertheless the molecular data confirm the distinctiveness of the two species. Based on shell characters, Gratecap (2014) considered A. allaryi to be a form of A. montrouzieri , a conclusion rejected by our molecular data. He also illustrated additional specimens ( Gratecap 2014 : figs 29 – no locality provided, 30 – Île des Pins at 450 m , 31 – no locality provided) as A. maritzae . The latter nominal species, which is known from the holotype only, is very similar to A. allaryi ( Fig. 16 G– H), differing in a larger and heavier shell and minor details of colouration. The stated type locality, “Norol reefs, northward of New Caledonia ”, is problematic. The place name “Norol reefs” is absent in New Caledonia , and the handwritten label accompanying the holotype in fact reads “Nord Récifs d’Entrecasteaux”, to the north of New Caledonia , where we have not found A. allaryi . The holotype originated from a commercial source and the locality needs confirmation. It may represent a separate species or a disjunct population of A. allaryi . In the absence of molecular material, we conditionally synonymize the two species and as first revisers select A. allaryi as the valid name. Distribution Judging from sequenced and dead collected material, Amalda allaryi inhabits a narrow perimeter near Île des Pins at depths of 90 to 250– 280 m ( holotype ) that lies completely within the range of A. montrouzieri ( 5–280 m ).