†Cyamocarcinus Bittner 1883 (crab)
Parent taxon: Dromioidea according to C. E. Schweitzer et al. 2010
Sister taxa: Ameridromia, Basinotopidae, Diaulacidae, Dromiidae, Dynomenidae, Eotrachynotocarcinus, Gemmellarocarcinus, Mesodromilites, Ovamene, Sphaerodromiidae, Stephanometopon
Subtaxa: Cyamocarcinus angustifrons
Type: Cyamocarcinus angustifrons
Ecology: epifaunal carnivore