PaleoDB taxon number: 118781
Alternative combination: Ichthyornis celer
Full reference: O. C. Marsh. 1873. Notice of a new Species of Ichthyornis . American Journal of Science and Arts 5(1):74
Sister taxon: Apatornis retustus
Type specimen: YPM 1451, a set of postcrania (synsacrum). Its type locality is Butte Creek, which is in a Coniacian/Santonian carbonate chalk in the Niobrara Formation of Kansas.
Ecology: ground dwelling carnivore