Like living animals, fossil remains of once-living animals are
classified and grouped according to their relationships to each other and to their ancestors.
Some fossils yield DNA which helps scientists determine these animals' similarity to living animals.
Order: Accipitirformes - includes hawks, eagles, vultures (or Ciconiiformes - includes storks, herons); taxonomy at this level uncertain
Family: Teratornithidae (extinct family of prehistoric birds)
Species: Teratornis merriami (Miller, 1909) - Merriam's Teratorn (extinct)
Species: Aiolornis incredibilis (Howard, 1952; new combination by Campbell) - Incredible Teratorn (extinct)
Species: Cathartornis gracilis (Miller, 1910) - Slender Teratorn (extinct)
Species: Argentavis magnificens (Campbell & Toni, 1980) - Magnificent Argentine Teratorn (extinct)
Campbell et al. (1999)
Campbell & Tonni (1980, 1983)
Chatterjee et al. (2007)
Howard (1963, 1972)