cassidinae (tortoise and leaf-mining beetles) in a broad sense is a subfamily of the leaf beetles, or chrysomelidae.it includes both the traditional hispinae (leaf-mining beetles) as well as the former more narrowly defined subfamily cassidinae (familiar US tortoise beetles) roomates are now split up into several tribes that including the tribe cassidini and in all include over 125 genera.the traditional separation of the two groups was based essentially on the habit of the larvae and the general shape of the adults.the name cassidinae for the merged subfamily is considered to have priority
