Trigonioidea
Trigonioidea is superfamily of medium-sized saltwater clams, marine bivalve molluscs. Within the fossil record the occurrence of this superfamily is widespread, ranging from the Devonian Period to Recent.
The diagnostic feature for the superfamily is the unique and complex dentition of the shell,. The dentition is particularly elaborate within the family Trigoniidae.
Bieler, Carter, & Coan included the following families in Trigonioidea. Taxa marked with a † are extinct.
Trigonioidea
