Rhodopetoma amycus Kantor & Fedosov & Puillandre 2025, comb. nov.

Rhodopetoma amycus (Dall, 1919) comb. nov. Fig. 34G Antiplanes amycus Dall, 1919: 36, pl. 11 fig. 5. Leucosyrinx kantori McLean, 1995: 81 (replacement name for Antiplanes amycus Dall, 1919), invalid. Type material Holotype UNITED STATES OF AMERICA • SL 21.5 mm; California, West of Monterey Bay; 36.7167° N, 122.2° W; depth 1063 m; USS Albatross, stn 3670; USNM 226163. Remarks Dall (1919) described two species with the epithet amycus – Antiplanes amycus (p. 36, pl. 11 fig. 5) and Leucosyrinx amycus (p. 5, pl. 3 fig. 7). McLean (1995) transferred Antiplanes amycus to Leucosyrinx and proposed a replacement name, Leucosyrinx kantori, to avoid secondary homonymy. Examination of the type specimen of Antiplanes amycus (USNM 226163) revealed that the anal sinus is situated in the lower part of the subsutural ramp and also occupies part of the shoulder, a feature not found in any species of Leucosyrinx. Therefore, this species should be excluded from Leucosyrinx, and according to Article 59.4 of the ICZN, the name Antiplanes amycus Dall, 1919 should be reinstated as valid. Based on conchological characters, we transfer the species to the genus Rhodopetoma Bartsch, 1944 (family Pseudomelatomidae). Rhodopetoma is very similar to Antiplanes, differing mainly in the presence of variously developed axial folds. The name Leucosyrinx kantori thus becomes invalid. Leucosyrinx amycus Dall, 1919 is considered a junior subjective synonym of Aforia goodei (Dall, 1890) (McLean 1971b). Distribution Type locality.