Order Oxyurida Railliet 1916 (roundworm)
Parent taxon: Nemata according to J. P. Hugot et al. 2014
Sister taxa: Anguillula, Copalonema, Enchytraeus, Enoplea, Ingenia, Vetus
Subtaxa: Heteroxynematidae
Distribution: found only at SÃtio Cortado, RST 287 Highway (Triassic of Brazil)