Temporal range: Late Jurassic
An artist's rendering of an adult Antrodemus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: Allosauridae
Genus: Antrodemus
Leidy, 1873
Species: A. valens
Type species
Antrodemus valens
(Leidy, 1870, originally Poekilopleuron)

Antrodemus is a dubious genus of theropod dinosaur from the Jurassic of Colorado. It was originally believed to be an American version of Poekilopleuron called Poicilopluerodon, however, it was soon given its own genus. Today, it is commonly believed to be a synonym of Allosaurus. It is only known from a set of tail vertebrae.




  1. Riabinin, 1915. Zamtka o dinozavry ise Zabaykalya [A note on a dinosaur from the trans-Baikal region]. Trudy Geologichyeskago Muszeyah Imeni Petra Velikago Imperatorskoy Academiy Nauk. 8(5), 133-140.
  2. Huene, 1932. Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte. Monographien zur Geologie und Palaeontologie. 4(1), viii + 361 pp.
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