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) highlighted additional evidence, including solitary fossil remains, to be attributed to P. bransoni from the Cooper Canyon Formation in Howard County, Texas, a geological formation dated to the Carnian era.