Antrodemus

Antrodemus Temporal range: Late Jurassic, 150 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Holotype tail vertebra (above) compared to same of Allosaurus (below)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Family:	†Allosauridae
Genus:	†Antrodemus Leidy, 1870
Species:	†A. valens
Binomial name
†Antrodemus valens (Leidy, 1870) Leidy, 1873
Synonyms
Poekilopleuron valens Leidy, 1870 Megalosaurus valens (Leidy, 1870) Nopcsa, 1901 Allosaurus valens (Leidy, 1870) Huene, 1932

Antrodemus ("chamber bodied") is a dubious genus of theropod dinosaur from the Upper Jurassic, probably the Morrison Formation, of Middle Park, Colorado. It contains one species, Antrodemus valens, first described and named as a species of Poekilopleuron by Joseph Leidy in 1870.