Protostrigidae

Protostrigidae is a prehistoric family of owls which occurred in North America, Europe,^[1] and Asia^[2] during the Eocene and early Oligocene periods.^[1] Genera include Eostrix, Minerva, Oligostrix,^[1] and Primoptynx.^[3] In 1983, Cécile Mourer-Chauviré demonstrated that Protostrix is a junior synonym of Minerva.^[1]

Protostrigidae Temporal range: Eocene to Oligocene
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Strigiformes
Family:	†Protostrigidae
Genera
Eostrix Minerva Oligostrix Primoptynx

Protostrigidae characteristics include strong first and second toes as well as a widened medial condyle of the tibiotarsus.^[1]