Pale Goblet Shell, Solenosteira pallida

Pale Goblet Shell, Solenosteira pallida. Shell collected off the beach of Punta Chivato, Baja California Sur, April 2025. Size: 2.7 cm (1.1 inches) x 1.7 cm (0.7 inches). Collection, photograph and identification courtesy of Colin Campbell, DVM, Punta Chivato.

Pale Goblet Shell, Solenosteira pallida.  Shell collected off the beach of Punta Chivato, Baja California Sur, April 2025. Size: 3.3 cm (1.3 inches) x 2.1 cm (0.8 inches). Collection, photograph and identification courtesy of Colin Campbell, DVM, Punta Chivato.

Phylogeny: The Pale Goblet Shell, Solenosteira pallida (Broderip & G.B. Sowerby I , 1829) is a gastropod mollusk in the Pisaniidae Family of False Triton Shells. The Solenosteira Genus is one of twenty genera in the Pisaniidae Family, and there are eight species in the Solenosteira Genus. They are also known as the Pallid Cantharus Shell.

Description:  Pale Goblet Shells are medium sized shells with a fusiform (spindle-like) shape. They have a  large body whorl, and a moderately high spire. The shoulders may be sharp or more rounded. The shell is sculpted with numerous, strong, spiral ridges and  heavy, axial ribs. They have a large aperture and a wide, open, siphon canal. The inside of the outer lip of the aperture is marked with fine teeth.  These shells are white in color, under a velvety or shaggy periostracum. Pale Goblet Shells reach a maximum of 4.2 cm (1.6 inches) in length.

Habitat and Distribution: Pale Goblet Shells are a poorly studied and documented species. Little has been documented of their habitat or range. Other similar species live near rocks, in sandy or muddy substrates. They are a tropical Eastern Pacific species. The Pale Goblet Shell is found in all Mexican waters of the Pacific Ocean with the exception that they are absent from the west coast of the Baja Peninsula.

Ecology and Behavior: The feeding behavior and diet of Pale Goblet Shells has not been documented. Other species in this family are scavengers or predators. Their predators likely include crabsm fish, and other gastropods. They are gonochoric and reproduce sexually, with internal fertilization. Like other shells in this family, the eggs are laid on the shell of a male Pale Goblet Shell.  Their engagement in any type of commensal, parasitic, or symbiotic relationship has not been formally documented. From a conservation perspective they have not been formally evaluated.

Synonyms: Fusus pallidus and Siphonalia pallida.