A “sand (or sand-stone) lizard” from Late Triassic or Early Jurassic Connecticut and Arizona, USA.

Only the back half of the specimen was rescued from a quarry in the Connecticut River Valley because the front half was already sawed into blocks to build South Manchester Bridge in Manchester. The bridge was demolished in 1969, and researchers at Yale were able to retrieve some additional fossil material.

Named by Othniel Charles Marsh (1831-1899) in 1891.