Leucosyrinx anteridion ( Watson, 1881 ), 2025

Kantor, Yuri I., Fedosov, Alexander & Puillandre, Nicolas, 2025, Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae), European Journal of Taxonomy 999, pp. 1-126 : 92

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.

Figures

Fig. 32. Types of species of Leucosyrinx Dall, 1889 known only from empty shells. A. L. aequatorialis Thiele, 1925, holotype, SL 13 mm (from Thiele 1925). B. L. anteridion (Watson, 1881) comb. nov., holotype, SL 22.1 mm (images by Aimee McArdle, NHMUK Photographic Unit). C. L. arcana (E.A. Smith, 1899) comb. nov., syntype, ZSI, M 926/1, SL 25.0 mm (from Annandale & Stewart 1909: pl. 9 fig. 6–6a). D. L. curviplicata (Sysoev, 1996) comb nov., holotype NHMUK 1993092, SL 32. 4 mm (images by Aimee McArdle, NHMUK Photographic Unit). E. L. eurina (E.A. Smith, 1899) comb. nov., paratype NHMUK 1904-6-15-139, SL 39 mm (photo courtesy of NHMUK). F. L. halicyria (Melvill, 1904) comb. nov., holotype, NHMUK 1905-7-14-49, SL 32.0 mm. G. L. julia Thiele, 1925, syntype, ZMB Mol 109379, SL 10.6 mm (photo courtesy of Museum für Naturkunde). H. L. pagodaeformis (Schepman, 1913) comb. nov, figured syntype, NATURALIS, ZMA.MOLL.137728, SL 28.7 mm (photo courtesy of K. Hasegawa). Shells not to scale.