Hokkaidornis is an extinct genus of penguin-like plotopterid from the Late Oligocene of Hokkaido, Japan.[1]
^Sakurai, K.; M. Kimura & T.A. Katoh (2008). "New penguin-like bird (Pelecaniformes; Plotopteridae) from the Late Oligocene Tokoro Formation, northeastern Hokkaido". Oryctos. 7: 83–94.
Hokkaidornis is an extinct genus of penguin-like plotopterid from the Late Oligocene of Hokkaido, Japan. The first Hokkaidornis remains were discovered...
intermediate in its stoutness between Tonsala and its larger Japanese relatives Hokkaidornis and Copepteryx. The complete tibiotarsus of the holotype, unique among...
than the large genera of Japanese tonsalin plotopterids Copepteryx and Hokkaidornis, but larger than the derived Plotopterum. Empeirodytes is mostly differentiated...
Early Oligocene, only being dwarfed by the giant Japanese plotopterids Hokkaidornis and Copepteryx. The scapula had a wider caudal portion with a more curved...
to compare it either to Copepteryx or to the then-newly erected genus Hokkaidornis, and were critical of the referral of specimens collected outside of...
Plotopterum, and smaller and more elongated than that of Copepteryx and Hokkaidornis. The pelvis of Tonsala was broad and shallow, more elongated than that...
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