†Orthonema columnare Erwin 1988

†Orthonema illineatus Erwin 1988

†Orthonema paedice Erwin 1988

†Orthonema paxillus Erwin 1988

†Orthonema striatonodosum Chronic 1952

†Orthonema telescopiforme Erwin 1988

†Orthonema tricingulatum Erwin 1988

†Streptacis inflata Erwin 1988

†Streptacis piercei Erwin 1988

G. †Metorthonema Erwin 1988

Fm. †Acteoninidae Pchelincev and Korobkov 1960

Fm. Streptacedidae Knight 1931