Family Heteroxynematidae Skrjabin and Shikhobalova 1948 (roundworm)
Parent taxon: Oxyurida according to J. P. Hugot et al. 2014
Sister taxa: none
Subtaxa: Paleoxyuris
Distribution: found only at SÃtio Cortado, RST 287 Highway (Triassic of Brazil)