Cassiavellia is an extinct genus of saltwater clams, marine bivalve molluscs in the subclass Pteriomorphia.

This genus existed in what is now Texas, during the upper Permian period.

[1] The type species is Cassiavellia galtarae, and the genus also contains the species C. nadkevnae.

This article about a prehistoric bivalve is a stub.

You can help Wikipedia by expanding it.