1	Body length 3–7 mm	2
	Body length under three mm	3
2	Adcloacal supplements two pairs	Timmus Goseco, Ferris & Ferris, 1976
	Adcloacal supplements one pair	Calolaimus Timm, 1964
3	Amphidial fovea bilobed, sclerotized	Athernema Ahmad & Jairajpuri, 1978
	Amhpidial fovea simple, not sclerotized	4
4	Odontostyle very short with apparently broken tip	Agmodorus Thorne, 1964
	Odontostyle normal	5
5	Tails dissimilar in sexes	Morasia Baqri & Jairajpuri, 1969
	Tails similar in sexes	6
6	Basal expansion of pharynx surrounded by a muscle sheath	Mydonomus Thorne, 1964
	Basal expansion of pharynx without muscle sheath	Dorylaimoides Thorne & Swanger, 1936