Leucosyrinx caecilia, 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 : 102-103

“ Leucosyrinx ” caecilia Thiele, 1925

Fig. 34A

Leucosyrinx caecilia Thiele, 1925: 202 (236), pl. 24 (36) fig. 23.

Leucosyrinx caecilia – Powell 1969: 337 (23-401), pl. 257 fig. 2.

Type material

Holotype TANZANIA • Dar-es-Salaam: 6°34′ S, 39°35′ E; depth 404 m; ZMB Mol 109385 .

Remarks

The single known specimen is the juvenile holotype, with SL of 7.5 mm. The anal sinus is typical of Leucosyrinx , but the shoulder is accentuated by two distinct and broad spiral cords that appear wavy on poorly pronounced axial folds. This type of sculpture is not found in other species of the genus, but it is unclear whether these features are characteristics of the juvenile shell or of the species as a whole. We tentatively retain the species within Leucosyrinx , though with some reservations.

Distribution

Type locality.

Figures

Fig. 34. A–F. Doubtful species of Leucosyrinx Dall, 1889. A. “Leucosyrinx” caecilia Thiele, 1925, holotype, ZMB Mol 109385, SL 7.5 mm (photo courtesy of Museum für Naturkunde). B. “Leucosyrinx” canyonensis (Dell, 1956), holotype, MNZ, M.009262, SL 9.3 mm (photo from the website of MNZ, https://collections.tepapa.govt.nz/object/151638). C. “Leucosyrinx” erna Thiele, 1925, syntype, ZMB Mol 109384, SL 7.8 mm (photo courtesy of Museum für Naturkunde). D–F. “Leucosyrinx” sansibarica Thiele, 1925. D. Original drawing (Thiele 1925: pl. 24 (36) fig. 1),? ZMB, SL 45 mm. E. Syntype, ZMB Mol 60089, Gulf of Aden, SL 42.6 mm (photo courtesy of Museum für Naturkunde). F. Syntype, ZMB Mol 109387, Gulf of Aden, SL 34.5 mm (= Comispira) (photo courtesy of Museum für Naturkunde). G–H. Types of species excluded from Leucosyrinx and Comitas H.J. Finlay, 1926. G. Rhodopetoma amycus (Dall, 1919) comb. nov., holotype, USNM 226163, SL 21.5 mm (photo courtesy of USNM). H. Burchia clionella (Dall, 1908), syntype, USNM 123125, SL 35.2 mm (photo courtesy of USNM).