Leucosyrinx anteridion, comb. nov.

Leucosyrinx anteridion (Watson, 1881) comb. nov. Fig. 32B Pleurotoma (Surcula) anteridion Watson, 1881: 399. Pleurotoma (Surcula) anteridion – Watson 1886: 295, pl. 19 fig. 6. Surcula anteridion – Thiele 1925: 188 (222), pl. 24(36) fig. 13. Comitas anteridion – Powell 1969: 273 (23-285), pl. 219 fig. 5. Type material Holotype SOUTH AFRICA • off Cape of Good Hope; 34°04′ S, 18°37′ E; depth 150 ftm (= 274 m); HMS Challenger stn 142; NHMUK, NHMUM 1887.2.9.977. Remarks The shell shape, sculpture pattern, and the shape of the subsutural anal sinus fit well within the variability observed in the species of Leucosyrinx as defined here. Given that the anal sinus shape aligns more closely with species of Leucosyrinx than with Comitas, we propose transferring the species to the former genus. Distribution Off South Africa, 270– 420 m. The record of Thiele (1925) from New Amsterdam, South Indian Ocean requires confirmation.