Comobatrachus (meaning "Como Bluff frog") is a dubious genus of extinct frog known only from the holotype, YPM 1863, part of the right humerus, found in Reed's Quarry 9 near Como Bluff, Wyoming in the Late Jurassic-aged Morrison Formation.[1] [2] The holotype was commented on but not described by Moodie in 1912,[3] although it was probably discovered alongside the holotype of Eobatrachus, but was not described by Othniel Charles Marsh when he named Eobatrachus in 1887.[4] The type, and only species, C. aenigmatis, was named and described in 1960.[5] It was probably related to the contemporaneous Eobatrachus.[6]