Spondylus ostreoides

Spondylus ostreoides is a species of spiny oyster. It was only found once, off Raoul Island in the South Pacific Ocean.^[1]

Spondylus ostreoides
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Pectinida
Family:	Spondylidae
Genus:	Spondylus
Species:	S. ostreoides
Binomial name
Spondylus ostreoides E. A. Smith, 1885

Description

The only known specimen of S. ostreoides was found in 1885 and is currently in the British Museum of Natural History; only the shell has been preserved. It is heavily worn, but appears to have commarginal rather than radial sculpture, a character not found in other members of the genus, and typical of true oysters or, within the Pectinoidea, the Entoliidae. The cemented valve length is 13.8 mm, upper valve length is 12.5 mm.