''Aenigmacaris'' is an extinct genus of

malacostraca Malacostraca (from New Latin; ) is the largest of the six classes of crustaceans, containing about 40,000 living species, divided among 16 orders. Its members, the malacostracans, display a great diversity of body forms and include crabs, l ...

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can ...

, which includes the species ''Aenigmacaris cornigerum'' and ''Aenigmacaris minima''. Their closest extant relatives are the mantis shrimp.

References

Prehistoric Malacostraca Prehistoric crustacean genera Fossil taxa described in 1978 Carboniferous arthropods of North America {{paleo-crustacean-stub