Describer

Marsh, 1891

Time

Jurassic Early ?Pliensbachian ?Toarcian

Classification

Saurischia Sauropodomorpha Prosauropoda Plateosauridae

Diet

Herbivore

Fossilsite

Upper Portland Formation, Newark Supergroup, Connecticut River Valley, Connecticut; Navajo Sandstone, Arizona, US

Length

4 meter

Info

Genus - Typespecies

Ammosaurus major (Marsh, 1891) = Anchisaurus major (Marsh, 1889)> Anchisaurus solus (Marsh, 1892)

4 incomplete skeletons, juvenile to adult.
The original specimen was almost complete, but Marsh was only able to save the posterior portion--the anterior part was in a sandstone block apparently used in constructing a bridge.