Cerithium pacificum Houbrick 1992

Cerithium pacificum

Clypeomorus trailli (Sowerby).—Springsteen and Leobrera. 1986:60, pl. 13: fig. 11 [not Cerithium traillii Sowerby, 1855; is Cerithium pacificum, new species].

DESCRIPTION (Figure 103).—Shell: Shell shiny, elongate, pupate, with convex apex, and comprising about 14 moderately convex adult whorls, reaching 27.1 mm length and 10.1 mm width. Protoconch unknown. Early teleoconch whorls with large axial ribs and having presutural cord divided into two weaker spiral cords forming presutural carinae. Axial ribs weaker and minor spiral cords appearing on successive whorls. Adult teleoconch whorls with very weak axial sculpture and with 3 spiral, weakly beaded cords. Subsutural beads axially elongate. Penultimate whorl sometimes with 4 spiral cords each having 14–35 small beads. Suture weakly defined, straight Body whorl thin, moderately inflated, but narrowly constricted subsuturally, and sculptured with strong subsutural plications; body whorl nearly smooth elsewhere except for weak spiral striae and large, broad varix opposite outer lip of aperture. Base of body whorl with slight basal excavation and moderately elongate, strongly constricted, anterior siphonal canal dorsally reflected to left of shell axis. Aperture narrowly ovate, about one–fourth the shell length. Columella concave with moderate callus and slight columellar lip. Anal canal well defined by parietal columellar tooth extending into aperture. Outer lip smooth, thickened, weakly flaired, and pendant Shell color a shiny cream to tan; early whorls white. Some specimens cream with tan axial flammules. Measurements (Table 33). Periostracum thin, tan. Operculum unknown.

Radula: Unknown.

Animal: Unknown.

HOLOTYPE.—USNM 584662; 23.4 mm length, 8.4 mm width (Figure 103AB).

PARATYPES..—USNM 862491, 4 specimens.

TYPE LOCALITY.—Bikini lagoon, Bikini Atoll, Marshall islands, 55–61 m.

ETYMOLOGY.—Named after the Pacific Ocean.

SYNONYMIC

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