Taxa Count: 8

TILLOTHERIIDAE

Esthonyx Cope, 1874

Esthonyx acutidens Cope, 1881

Esthonyx bisulcatus Cope, 1874

Esthonyx spatularius Cope, 1880

Trogosus Leidy, 1871

Trogosus castoridens Leidy, 1871

Trogosus grangeri Gazin, 1953

Trogosus hillsii Gazin, 1953