Family Colymbidae Shaw 1824 (avialan)
Reptilia - Colymbiformes - Colymbidae
Parent taxon: Colymbiformes according to O. P. Hay 1930
See also Brodkorb 1955, Hay 1902, Wetmore 1933, Wetmore 1940 and Wetmore 1956
Sister taxa: none
Subtaxa: Colymbus
Type: Colymbus
Ecology: ground dwelling carnivore
Distribution:
• Quaternary of Monaco (1 collection), United States (1: California)
• Pliocene to Pleistocene of Italy (1), United States (1: California)
• Pliocene of United States (2: California, Idaho)
• Neogene of United States (1: Arizona)
• Oligocene of United States (1: Oregon)
Total: 8 collections including 9 occurrences