Full reference: E. T. Newton. 1893. On some New Reptiles from the Elgin Sandstones. Transactions of the Royal Society of London, Series B, Biological Sciences 184:431-503
Sister taxa: none
Type specimen: GSE 4783 to 4788, a partial skeleton. Its type locality is Cutties Hillock Millstone Quarry, which is in a Changhsingian fluvial sandstone in the Cutties Hillock Sandstone Formation of the United Kingdom.