Sulcosinus Dall, 1895

Mclean, James H. & Clark, Roger N., 2023, Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska, Zootaxa 5351 (2), pp. 151-201 : 195-196

Genus Sulcosinus Dall, 1895

Type species: Buccinum taphrium Dall, 1891 (by OD)

Description: Periostracum relatively thick, light olive, adherent, shiny or with very fine rows of microscopic bristles; shoulder subangulate, whorls rounded below strongly tabulate shoulder, suture deeply impressed. Apical whorls depressed. Axial sculpture lacking; spiral sculpture of early teleconch with sharply incised striations, becoming obsolete in later whorls; mature sculpture of low, somewhat irregular, slanted ridges; siphonal canal lacking, aperture deeply notched at base of pillar; lip thickened and slightly flared; lip may be continuous posteriorly across anal sinus, with continuous, offset parietal shield.

Radula typical of buccininae, rachidian tooth with multiple cusps (3–4), lateral teeth with three cusps. Operculum large, nearly filling aperture, nucleus sub-terminal.