Leucosyrinx suratensis ( Thiele, 1925 )

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 : 101-102

Leucosyrinx suratensis ( Thiele, 1925)

Fig. 33H

Surcula suratensis Thiele, 1925: 180 (214), pl. 23(35) fig. 19.

Surcula coreanica (Adams & Reeve, 1848) (not of Adams & Reeve 1850) – von Martens 1904: 80, pl. 2 fig. 3.

? Leucosyrinx suratensis – Powell 1969: 340 (23-404), pl. 259 figs 1–2.

Type material

Holotype

INDONESIA • off north Sumatra; 5°23′ N, 94°48′ E; depth 1024 m; ZMB Moll 60072.

Remarks

The holotype measures 16.6 mm in shell length and exhibits significant shell breakage followed by subsequent repair, resulting in an exaggeratedly deep anal sinus. Von Martens (1904) illustrated only the lateral view of the shell. The remaining intact whorls demonstrate the characteristic shape of the anal sinus typical of Leucosyrinx , and, overall, the shell morphology aligns with the variability seen within the genus.

Leucosyrinx suratensis resembles several species of Leucosyrinx , particularly L. floraecharlottae sp. nov. and L. ringevali sp. nov. However, it differs in having more pronounced spiral cords on the subsutural ramp and a stouter shell with a more rapidly constricting shell base.

Distribution

Type locality.

Figures

Fig. 33. Types of species of Leucosyrinx Dall, 1889 known only from empty shells. A. L. palawanica (Powell, 1969) comb. nov., holotype USMNM 237910, SL 43.5 mm. B–D. L. paupera (Watson, 1881) comb. nov. B. Lectotype, NHMUK 1887.2.9.1009, SL 40.1 mm. C. Paralectotype NHMUK 1887-2-9- 1010, SL 33.3 mm (= Borsoniidae, genus and species uncertain). D. Paralectotype NHMUK 1887-2-9- 1011, SL 18.5 mm (= L. arcana). E. L. undosa (Schepman, 1913) comb. nov., holotype, NATURALIS, ZMA.MOLL.136841, SL 29.5 mm (photo courtesy of K. Hasegawa).F. L. erilda (Dall, 1908), holotype, USNM 123091, SL 18 mm (photo courtesy of USNM). G. L. powelli (Rehder & Ladd, 1973), holotype, USNM 703267, SL 13.0 mm (photo courtesy of USNM). H. L. suratensis (Thiele, 1925), holotype, ZMB Moll 60072, SL 16.6 mm (photo courtesy of Museum für Naturkunde). Shells not to scale.