PaleoDB taxon number: 370990

Full reference: G. Mayr and J. L. Goedert. 2016. New Late Eocene and Oligocene Remains of the Flightless, Penguin-Like Plotopterids (Aves, Plotopteridae) from Western Washington State, U.S.A. Journal of Vertebrate Paleontology 36(4):e1163573

Belongs to Klallamornis according to G. Mayr and J. L. Goedert 2016

Sister taxon: Klallamornis abyssa

Type specimen: LACM 129405, a limb element (left tarsometatarsus with restored lateral portion of trochlea metatarsi IV). Its type locality is Jansen Creek Mbr, Makah Fm - Jansen Creek, which is in a Bartonian/Chattian deep-water sandstone/conglomerate in the Makah Formation of Washington.