heading Dinosaur Info same page Dinosaur Collections and Exhibits Interactives Home Paleobiology Department Home Page National Museum of Natural History Home Page Smithsonian Home Page

DINOSAUR TYPE SPECIMENS
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Agathaumas milo
Alamosaurus sanjuanensis
> Allosaurus medius
Anatosaurus annectens [see Claosaurus annectens]
Antrodemus valens
Archaeornithomimus affinis [see Ornithomimus affinis]
Arrhinoceratops utahensis
Astrodon altus [see Pleurocoelus altus]
Astrodon nanus [see Pleurocoelus nanus]

> Allosaurus medius - Marsh 1888  
Catalogue: USNM 4972
Material: partial tooth
Classification: Saurischia, Theropoda incertae sedis
Place: Arundel Formation, near Muirkirk, Maryland, USA
Time: Aptian, Early Cretaceous
Original Publication: O. C. Marsh. 1888. American Journal of Science 35:89-94
Other References: Gilmore, 1920

This extremely fragmentary specimen was referred to Dryptosaurus by Gilmore in 1920. The specimen is far too incomplete to properly place it within any current valid genus, therefore we call it Theropoda incertae sedis, which loosely translates to “it is a theropod, but that is all I can say”.