Trapezioidea

Trapezioidea is a superfamily of crabs. Its members live symbiotically with corals, and have a fossil record stretching back to the Eocene.

Families
The World Register of Marine Species lists the following families:
 * Domeciidae Ortmann, 1893
 * Tetraliidae Castro, Ng & Ahyong, 2004
 * Trapeziidae Miers, 1886