Plaesiomyidae Schuchert, 1913

Austinella Foerste, 1909

Campylorthis Ulrich & Cooper, 1942

Chaulistomella Cooper, 1956

Dinorthis Hall & Clarke, 1892

Evenkina Andreeva, 1961

Metorthis

Multicostella Schuchert & Cooper, 1931

Pionorthis Schuchert & Cooper, 1931

Plaesiomys Hall & Clarke, 1892

Retrorsirostra Schuchert & Cooper, 1931