 Erpetosuchid osteoderms are also typically thicker and more ornamented than the thin, smooth ones of "Aenigmaspina".Gracilisuchids are another small group it could belong to, however they can only be compared to by their osteoderms and vertebrae, both of which differ from "Aenigmaspina" (particularly the neural spines, which are uniquely trapezoid-shaped in gracilisuchids, unlike the rectangular spines of "Aenigmaspina").However, osteoderm texture is known to vary throughout Pseudosuchia, so this trait may not be significant.