Blepharipodidae
Blepharipodidae is a family of sand crabs, comprising the two genera Blepharipoda and Lophomastix. They are distinguished from the other families in the superfamily Hippoidea by the form of the gills, which are trichobranchiate in Blepharipodidae, but phyllobranchiate in Albuneidae and Hippidae. Fossils belonging to the genus Lophomastix have been found in rocks dating back to the Eocene.