Family Cymonomidae Bouvier 1897 (crab)
Malacostraca - Decapoda - Cymonomidae
Parent taxon: Cyclodorippoidea according to C. E. Schweitzer et al. 2017
See also Ng et al. 2009 and Schweitzer et al. 2010
Sister taxa: Albenizus, Caporiondolus, Cyclodorippidae, Phyllotymolinidae, Quadratoplanidae, Spathanomus
Subtaxa: Cymonomoides Cymonomus Doratiopus Eonomus
Type: Cymonomus
Ecology: epifaunal carnivore
Distribution:
• Eocene of United States (1: California collection)
• Paleogene of Hungary (1)
Total: 2 collections each including a single occurrence