Abstract
An unusual new archosaurian reptile, Euscolosuchus olseni, gen. et sp. nov., is described from the Tomahawk Creek Member of the Turkey Branch Formation of the Richmond basin (Newark Supergroup; Upper Triassic: Carnian) in east-central Virginia. Its distinctive, narrow carapace comprises paired, sharply angulated paramedian osteoderms that bear much enlarged lateral spines and have crocodile-like external ornamentation. Euscolosuchus is referable to the Crurotarsi and closely resembles basal Crocodyliformes in the structure of its dorsal dermal armor.