PaleoDB taxon number: 36620
Synonyms: Coniornis Marsh 1893 (no. 39249), Hargeria Lucas 1903 (no. 137270), Lestornis Marsh 1876 (no. 118788)
Full reference: O. C. Marsh. 1872. Preliminary description of Hesperornis regalis, with notices of four other new species of Cretaceous birds. The American Journal of Science and Arts, series 3 3(13-18):360-365
Parent taxon: Hesperornithidae according to A. Bell and L. M. Chiappe 2016
Sister taxa: Asiahesperornithinae, Canadaga, Parahesperornis
Subtaxa: Hesperornis altus, Hesperornis bairdi, Hesperornis chowi, Hesperornis crassipes, Hesperornis gracilis, Hesperornis lumgairi, Hesperornis macdonaldi, Hesperornis mengeli, Hesperornis montana, Hesperornis regalis, Hesperornis rossicus
Ecology: aquatic piscivore