	"Feeserpeton" was included in a phylogenetic analysis when it was first named in 2012. It nested within the clade Lanthanosuchoidea, a poorly known group that includes the parareptiles "Acleistorhinus" and "Lanthanosuchus". "Feeserpeton" was found to be a basal member of this group, the sister taxon of a clade including "Acleistorhinus" and "Lanthanosuchus". Features that place "Feeserpeton" within Lanthanosuchoidea include a ridge on the frontal bone above the eye socket, a plate-like supraoccipital bone with a sagittal crest on the braincase, and a notch midway along the margin of the back of the skull. "Feeserpeton" is the oldest member of the clade. Below is a cladogram from the analysis showing the position of "Feeserpeton":