Order Mermithida Hyman 1951 (roundworm)
Parent taxon: Dorylaimia according to G. O. Poinar 2011
See also Poinar 2000
Sister taxa: Chromadorida, Desmoscolecida, Plectida, Rhabditida
Subtaxa: Mermithoidea
Distribution:
• Pliocene of Germany (1 collection)
• Miocene of the Dominican Republic (2), Mexico (1)
• Oligocene of Germany (1)
• Eocene of Denmark (1), Poland (1), the Russian Federation (4)
• Cretaceous of Lebanon (1), Myanmar (6)
Total: 18 collections including 46 occurrences