PaleoDB taxon number: 141073
Full reference: P. Brodkorb. 1963. Birds from the Upper Cretaceous of Wyoming. Proceedings of the XIII International Ornithological Congress 55-70
Sister taxa: none
Type specimen: UCMP 53959, a limb element (right coracoid). Its type locality is Lull 2 Quarry (UCMP V-5620), which is in a Maastrichtian terrestrial sandstone in the Lance Formation of Wyoming.
Ecology: ground dwelling carnivore