(Petrolacosaurus,(Youngina,((Lazarussuchus,(Champsosaurus,Cteniogenys)),((Squamata,Gephyrosaurus),((Protorosaurus,((Macrocnemus,(Langobardisaurus,Tanystropheus)),(Megalancosaurus,Drepanosaurus))),(Trilophosaurus,((Mesosuchus,Howesia),(Prolacerta,(Proterosuchus,Euparkeria)))))))));