Sibogasyrinx Powell, 1969

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 : 9

Genus Sibogasyrinx Powell, 1969

(family Cochlespiridae )

Leucosyrinx (Sibogasyrinx) Powell, 1969: 343 (23-411).

Type species

Surcula pyramidalis Schepman, 1913 (OD).

Remarks

The molecular phylogenetic analysis of nine species of Sibogasyrinx ( Kantor & Puillandre 2021) demonstrated that all species attributed to the genus have a row of nodules situated directly below the suture ( Fig. 3G–H ). On the contrary, none of Leucosyrinx as defined here by molecular analysis has these nodules. The significance of this diagnostic character was not recognized prior to the current publication and many species with subsutural nodules were erroneously attributed to Leucosyrinx or Comitas mostly by Powell (1969). Radula in Sibogasyrinx is characterized by duplex marginal teeth of varying morphology and the presence of a well-defined central formation with a long cusp ( Kantor & Puillandre 2021).

Figures

Fig. 3. Genera of Conoidea Fleming, 1822, similar to Leucosyrinx Dall, 1889 and confused with it. A–C. Antarctospira badenpowelli (Dell, 1990) (family Borsoniidae). A–B. Holotype, USNM 613118, Victoria Land, McMurdo Sound, east of Cape Hallett,72°08′ S,172°10′ E, 433 m, SL 19.9 mm, apertural view of the shell and enlarged anal sinus. C. Paratype, USNM 860180, South Shetland Is., 72°06′ S, 172°12′ E, 433 m, SL 21.5 mm; radula. D–F. Comitas sp. (family Pseudomelatomidae), MNHN-IM- 2007-17918, Philippines, Bohol Sea, 762–786 m, SL 114.3 mm; apertural view of the shell, enlarged anal sinus, radula. G–I. Sibogasyrinx cf. pyramidalis 1 (Schepman, 1913) (family Cochlespiridae), MNHN-IM-2009-13451, Philippines, off Luzon I., 593–600 m, SL 46.5 mm; apertural view of the shell, enlarged anal sinus (arrow indicates the subsutural row of nodules, present only in Cochlespiridae), radula. J. Comispira mai (B.-Q. Li & X.-Z. Li, 2008), MNHN-IM-2013-61657, South China Sea, 1128– 1278 m, SL 35.5 mm.