Leucosyrinx suratensis

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.