''Aenigmacaris'' is an extinct genus of

malacostraca Malacostraca is the second largest of the six classes of pancrustaceans behind insects, containing about 40,000 living species, divided among 16 orders. Its members, the malacostracans, display a great diversity of body forms and include crab ...

crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...

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

mantis shrimp Mantis shrimp are carnivorous marine crustaceans of the order Stomatopoda (). Stomatopods branched off from other members of the class Malacostraca around 400 million years ago, with more than 520 extant species of mantis shrimp known. All li ...

References

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