Cerithium crassilabrum F. Krauss 1848

Cerithium crassilabrum Krauss, 1848

Cerithium crassilabrum Krauss, 1848:107–108, pl. 6: fig. 10. [Type originally at Stuttgart Museum, but subsequently lost (see Janus, 1961:2); type locality: Natal coast; not Cerithium crassilabrum Orbigny, 1850. Neotype herein designated: NM 7303, 15.9 mm × 6.8 mm, Coffee Bay, Transkei, South Africa.].—Kensley, 1973:79, fig. 266.—Kilbum and Rippey, 1982:54, pl. 11: fig. 3.

DESCRIPTION.—Shell (Figure 42): Shell stout, conical-turrate, comprising 10 moderately inflated, granulose whorls and attaining 17 mm length and 7 mm width. Protoconch unknown. Early teleoconch sculptured with about 6 spiral threads per whorl. Adult teleoconch whorls sculptured with three major beaded spiral cords with a minor beaded cord in each interspace. Two largest major cords at whorl periphery. Penultimate whorl angulate at periphery. Subsutural cord cincture-like with many rounded beads. Suture impressed, well defined. Body whorl large, wide, sculptured with 7 or 8 spiral cords, weakly beaded and with weak siphonal constriction at truncated base. Several weak varices irregularly placed. Aperture ovate, large, about one-third the shell length. Anterior siphonal canal very short and wide, strongly reflexed to left of shell axis. Anal canal well developed, bordered with weak parietal columellar tooth. Columella concave with thick callus and minor columellar lip. Outer lip thickened, smooth, and convex. Shell color flesh to tan with brown and white alternate spots on spiral cords. Beads white. Periostracum tan.

Radula (Figure 43): Type-1 radular ribbon (Figure 3A) robust, a little over one-seventh the shell length. Rachidian tooth (Figure 43B) square, having sharply pointed, central, posterior extension and pair of lunate ridges at base of basal plate. Front of rachidian tooth convex; cutting edge with large spade-shaped main cusp flanked on each side by two small denticles. Lateral tooth (Figure 43B) with broad basal plate having thick central ridge bearing small peg, and with long, basal-lateral projection. Marginal teeth (Figure 43A,B) short with broad stems, pointed bases, and serrated, curved apices. Inner marginal tooth with rounded main cusp, two sharp, flanking inner denticles, and one outer flanking denticle. Outer marginal tooth same, but lacking outer flanking denticle.

Anatomy (based on dried animal): Dorsal two-thirds of mantle edge papillate. Large, broad, muscular snout pigmented with dark brown, transverse stripes. Cephalic tentacles relatively long and thick. Paired jaws, each about 0.9 mm long. Palliai gonoducts unknown.

SYNONYMIC

Cerithium crassilabrum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.