Cerithium traillii G. B. Sowerby II 1855

Cerithium traillii Sowerby, 1855

Cerithium trailli Sowerby, 1855:871, pl. 182, figs. 173, 174 [holotype: BMNH 1986181; type locality: Singapore]; 1865, pl. 4: fig. 24.—Tryon, 1887:871, pl. 25: fig. 47 [put only].—Kobelt, 1893:99, pl. 20: figs. 1, 2.

Clypeomorus trailli [sic] (Sowerby).—Hibe, 1964:41, pl. 12: fig. 24.— Cernohorsky, 1972:71, pl. 16: fig. 10.

Clypeomorus traillii (Sowerby).—Springsteen ind Leobrera, 1986:60, pl. 13: fig. 11 [not Cerithium traillii Sowerby; is Cerithium pacificum, new species].

DESCRIPTION.—Shell (Figure 138): Shell large, turreted, elongate, with broad base, comprising up to 17 straight-sided whorls, and attaining 48 mm length and 17.4 mm width. Protoconch unknown. Early teleoconch whorls sculptured with 3 weak spiral lirae crossed by strong axial ribs. Adult teleoconch sculptured with 3 major beaded spiral cords, weak spiral lirae with tiny beads in interspaces, and microscopic spiral incised lines. Beads sometimes aligned to form 24–45 weak axial ribs, but ribs normally absent Several varices randomly distributed. Suture moderately impressed, distinct. Body whorl large, wide and with large, thickened varix opposite outer lip of aperture; sculptured with 5 major beaded spiral cords, with weaker beaded cords in interspaces. Base of body whorl moderately excavated, sculptured with 4 or 5 narrow, beaded spiral cords. Anterior siphonal canal short, tubular, well defined, slightly turned to left of shell axis. Aperture ovate, large, a little more than one-third the shell length. Columella concave, with thickened lip. Anal canal large, bordered with strong, parietal, columellar plait Outer lip of aperture convex, rounded, weakly crenulate, and thickened at edge. Shell color white, with wide to narrow, spiral tan bands, broad tan blotches, and frequently with brown beads. Varices, early whorls and aperture white. Measurements (Table 44). Periostracum thin, light tan.

Radula (Figure 139): Type-1 radular ribbon short, about one-thirteenth the shell length. Rachidian tooth (Figure 139D) rounded-triangular, having basal plate with short median posterior extension and pair of basal ridges; anterior front weakly concave, and cutting edge with large, spade-shaped main cusp flanked on each side by 2 weak denticles. Lateral tooth (Figure 139C) with broad, long median buttress extending posteriorly and with long, lateral, posterior extension on basal plate; cutting edge with large pointed main cusp, one inner-flanking denticle, and 2 outer-flanking, pointed denticles. Marginal teeth (Figure 139C) spatulate with broad bases and tapering, curved, serrated tips. Inner marginal tooth with broad, elongate, main cusp, 3 inner flanking denticles, and 2 outer flanking denticles. Outer marginal tooth same, but lacking outer flanking denticles.

Anatomy: Ctenidium brown, hypobranchial gland bright green.

Type-A palliai oviduct. Outer edge of anterior medial lamina with short sperm gutter opening into blind anterior pocket and continuing posteriorly to enter spermatophore bursa.

SYNONYMIC

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