 At least one individual of "Aenigmaspina" is definitively known.This individual, 'Edgar', consists of a pair of split blocks (the holotype NHMUK P9/3a) that together contain osteoderms, vertebrae, ribs and a scapula clustered tightly together, as well as more pieces from the forelimb and additional vertebrae that likely belong to this individual.The specimen was found tightly curled up, possibly because the animal died in a burrow before being preserved.