Crepicephalidae
Crepicephalus borealis
Crepicephalus ceratopygoides Raymond
Crepicephalus convexus Walcott, 1911
Crepicephalus damia Walcott, 1905
Crepicephalus etheridgei Chapman, 1911
Crepicephalus iowaensis Owen
Crepicephalus iowensis (Owen)
Crepicephalus magnus Walcott, 1905
Crepicephalus tasmanicus Etheridge
Crepicephalus texanus Shumard