In 2002, Martin and Lim formally recognized several new species for remains that had previously been unstudied or referred without consideration to previously named North American hesperornithines.
Martin i Lim su 2002. godine formalno priznali nekoliko novih vrsta na osnovu ostataka koji prije nisu bili istraženi ili su bez razmatranja priključani kao ostaci nekih hesperornitiforma iz Sjeverne Amerike.