Citation:

Burigo, A., & Mateus O. (2024).  Notes on the type specimens of Allosaurus atrox and A. Ferox (Theropoda, Allosauridae). Paleolusitana. 2, 18-20.

Abstract:

Allosaurus Marsh, 1877 is one of the most iconic theropods of the Late Jurassic of USA and Portugal. However,
since the first description the genus was used as taxonomical wastebasket to which several species were
described. We revisit three type specimens, Allosaurus fragilis YPM 1930, A. atrox YPM 1890 and A. ferox USNM
2315. We interpret the vertebral material of A. atrox and support it as a junior synonym of A. fragilis, and A. ferox
as Allosaurus indet. rather than A. fragilis.