Alternative combination: Osteodontornis orri
Full reference: H. Howard. 1957. A gigantic "toothed" marine bird from the Miocene of California. Santa Barbara Museum of Natural History, Department of Geology Bulletin 1:1-23
Type specimen: SBMNH 309, a partial skeleton. Its type locality is Tepusquet Creek, which is in a Miocene marine shale in California.
Ecology: ground dwelling carnivore