Sibogasyrinx Powell 1969

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).