Amalda hilgendorfi subsp. richeri, Kilburn & Bouchet, 1988, Kilburn & Bouchet, 1988

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 : 21

Northern New Caledonia morph (“ A. hilgendorfi richeri ”)

Figs 2 (as nNC), 5G–K

Material examined

Sequenced material

15 sequenced specimens ( Table 1).

Not sequenced material

Material listed by Kilburn & Bouchet (1988).

Remarks

Shell large (SL up to 76 mm), somewhat similar to the morph from the Coral Sea, although adult shells are more slender and the callused carina is less developed. Upper anterior band with more defined, relatively narrow, median carina. Plication plate uniformly white. Smaller specimens are more ovoid in shape, with relatively more pronounced carina and uniformly convex upper anterior band; the upper part of plication plate can be yellowish. Upper whorls often have a purplish tint. Number of columellar ridges variable, 2 to 6, regardless of specimen size. First protoconch whorl diameter 0.80–0.84 mm (mean 0.83, n=5). Depth range 360– 750 m.

Figures

Fig. 2. Molecular phylogeny of Amalda hilgendorfi (von Martens, 1897) produced by a Bayesian analysis of the Cox1 gene dataset. Outgroups and other species of Amalda have been removed from the tree. Only posterior probabilities ± 90% are shown. The unit for the scale is “substitutions/site”. The geographical distribution and morphological morphs are coded for each specimen: Phil =Philippines; Sol =Solomon Islands; PNG= Papua New Guinea; sNC = South New Caledonia; nNC = North New Caledonia; CS=Coral Sea. Numbers in parentheses at the tips of the tree link the MNHN IM voucher number to the corresponding photo on the right.