Podiceps grisegena holbollii Reinhardt 1854 (red-necked grebe)
Aves - Podicipediformes - Podicipedidae
Alternative combinations: Colymbus holbellii, Colymbus holboelii, Podiceps holbollii
Belongs to Podiceps grisegena according to J. F. Clements et al. 2017
See also Hay 1902, Hay 1930 and Shufeldt 1891
Sister taxa: none
Distribution: found only at Silver Lake (Quaternary of Oregon)