Full reference: N. C. Fraser, K. Padian, G. M. Walkden and A. L. M. Davis. 2002. Basal dinosauriform remains from Britain and the diagnosis of the Dinosauria. Palaeontology 45(1):79-95
Sister taxa: none
Type specimen: VMNH 1745. Its type locality is Cromhall Quarry (1990 fill), which is in a Rhaetian fissure fill horizon in the United Kingdom.
Average measurements (in mm): humerus 46.5 x 5.0