[D] Creosaurus atrox [jG]
Describer
Marsh, 1878
Time
Cretaceous Early Hauterivian Barremian
Classification
Saurischia Theropoda Tetanurae Carnosauria Allosauridae
Diet
Carnivore
Fossilsite
Arundel formation, Maryland, US
Fall Under
Allosaurus
Info
Genus
Allosaurus (Marsh, 1877) = Creosaurus (Marsh, 1878) Epanterias (Cope, 1878) Labrosaurus (Marsh, 1879) ?Saurophagus (Ray, 1941)
Allosaurus > Allosaurus fragilis (Marsh, 1877) Laelaps trihedrodon (Cope, 1877) Creosaurus atrox (Marsh, 1878) Epanteris amplexus (Cope, 1878) Hypsirhophus discurus (1) [partim] (Cope, 1878) Allosaurus lucaris (Marsh, 1878) Allosaurus ferox (Marsh, 1896) ?Saurophagus maximus (Ray, 1941) ?Labrosaurus ferox (Marsh, 1884) Camptosaurus amplus (Marsh, 1879) = Camptonotus amplus (Marsh, 1879) Allosaurus whitei (Pickering, 1995)
Allosaurus > ?Allosaurus tendagurensis (Janensch, 1925)
Allosaurus > Allosaurus europaeus (Mateus, Walen and Antunes 2006)
Based on a few skull elements, hyoid, vertebral fragments, a supposed sternum which is lost, ilium, astragalus and pedal fragments. The jugal shows an A. fragilis -like ventral deflection,but the ilium has an Allosaurus. sp. nov.-like vertical ridge.
Generally treated as a junior synonym of Allosaurus fragilis, the form is considered a distinct species [A. atrox], and possibly a definable genus by a few researchers.
Marsh, 1878
Time
Cretaceous Early Hauterivian Barremian
Classification
Saurischia Theropoda Tetanurae Carnosauria Allosauridae
Diet
Carnivore
Fossilsite
Arundel formation, Maryland, US
Fall Under
Allosaurus
Info
Genus
Allosaurus (Marsh, 1877) = Creosaurus (Marsh, 1878) Epanterias (Cope, 1878) Labrosaurus (Marsh, 1879) ?Saurophagus (Ray, 1941)
Allosaurus > Allosaurus fragilis (Marsh, 1877) Laelaps trihedrodon (Cope, 1877) Creosaurus atrox (Marsh, 1878) Epanteris amplexus (Cope, 1878) Hypsirhophus discurus (1) [partim] (Cope, 1878) Allosaurus lucaris (Marsh, 1878) Allosaurus ferox (Marsh, 1896) ?Saurophagus maximus (Ray, 1941) ?Labrosaurus ferox (Marsh, 1884) Camptosaurus amplus (Marsh, 1879) = Camptonotus amplus (Marsh, 1879) Allosaurus whitei (Pickering, 1995)
Allosaurus > ?Allosaurus tendagurensis (Janensch, 1925)
Allosaurus > Allosaurus europaeus (Mateus, Walen and Antunes 2006)
Based on a few skull elements, hyoid, vertebral fragments, a supposed sternum which is lost, ilium, astragalus and pedal fragments. The jugal shows an A. fragilis -like ventral deflection,but the ilium has an Allosaurus. sp. nov.-like vertical ridge.
Generally treated as a junior synonym of Allosaurus fragilis, the form is considered a distinct species [A. atrox], and possibly a definable genus by a few researchers.