Amalda allaryi Bozzetti, 2007

Kantor, Yuri I., Castelin, Magalie, Fedosov, Alexander & Bouchet, Philippe, 2020, The Indo-Pacific Amalda (Neogastropoda, Olivoidea, Ancillariidae) revisited with molecular data, with special emphasis on New Caledonia, European Journal of Taxonomy 706, pp. 1-59 : 40-41

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).

Figures

Fig. 13. Radulae of species of Amalda H. Adams & A. Adams, 1853. A–C. A. montrouzieri (Souverbie, 1860). A–B. Île Ouen – Baie du Prony, LAGON, stn DW239, 22°24.3′ S, 166°57.8′ E, 42–43 m, SL 20.2 mm. C. Grand Récif Sud, LAGON, stn DW544, 22°50.8′ S, 166°48.5′ E, 25 m, SL 25.4 mm (shell on Fig. 12I). D–E. A. alabaster sp. nov. D. Holotype, MNHN IM-2007-43627, SL 26.7 mm (shell on Fig. 15A–B). E. MNHN IM-2007-43636, SL 17.6 mm. F. A. cf. alabaster, MNHN IM-2013-63897, SL 18.1 mm (shell on Fig. 15H–I). G. A. allaryi Bozzetti, 2007, MNHN IM-2013- 68272 (shell on Fig. 17A). H. A. coriolis Kilburn & Bouchet, 1988, MNHN IM-2013-63899 (shell on Fig. 18H–I).

Fig. 16. A–F. Amalda allaryi Bozzetti, 2007. A–B. Holotype, MNHN IM-2000-20532, SL 29.4 mm. C–D. MNHN IM-2007-43630, SL 27.2 mm. E. MNHN IM-2007-43628, SL 24.4 mm. F. KANACONO, stn CP4656, 22°40′ S, 167°12′ E, 219–244 m, W of Île des Pins, SL 64.5 mm. G–H. A. maritzae Bozzetti, 2007, holotype, MNHN IM-2000-24475, SL 54.4 mm. A–E= at the same scale; F–H =at the same scale; C–E =sequenced specimens.

Fig. 17. Comparison of Amalda allaryi Bozzetti, 2007 with A. montrouzieri (Souverbie, 1860). A–B. A. allaryi, MNHN IM-2013-68272, SL 26.2 mm, specimen not sequenced. C–D. A. montrouzieri, LAGON, stn DW51, Nouméa Sector, 22°15′ S, 166°11′ E, 10 m, SL 27.6 mm, specimen not sequenced.