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However, the phylogenetic analysis conducted by Cisneros et al. (2021) did not recover a clade uniting lanthanosuchids and acleistorhinids to the exclusion of all other parareptiles. Instead, acleistorhinids were recovered as the sister group of the clade Procolophonia, while lanthanosuchids were recovered within the procolophonian subgroup Pareiasauromorpha.
MacDougall, M.J.; Modesto, S. P.; Reisz, R. R. (2016). "A new reptile from the Richards Spur Locality, Oklahoma, USA, and patterns of Early Permian parareptile diversification". Journal of Vertebrate Paleontology. 36 (5): e1179641. doi:10.1080/02724634.2016.1179641. S2CID89333948.