Later, Long and Murry (1995) referred additional material, including isolated postcranial remains, to P. bransoni from the Carnian-aged Cooper Canyon Formation of the Dockum Group, Howard County, Texas.
Later, Long and Murry (1995) presented supplementary data, including isolated skeletal elements, to P. bransoni from the Cooper Canyon Formation of the Dockum Group in Texas, which is part of the Carnian-aged deposits.