Aenigmacaris

Aenigmacaris
Aenigmacaris cornigerum SCHRAM & HORNER 1979 from the Mississippian (Serpukhovian) Heath Formation of Bear Gulch, Montana.
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Aenigmacaris

Schram and Horner, 1978 

Aenigmacaris is an extinct genus of malacostracan crustacean, which includes the species Aenigmacaris cornigerum and Aenigmacaris minima. Their closest extant relatives are the mantis shrimp.