(outgroup,(Dolichosaurus_longicollis,((Aigialosaurus_dalmaticus,Aigialosaurus_buccichi,Carsosaurus),(Halisaurus,((Ectenosaurus,(Clidastes,Mosasaurus)),(Tylosaurus,Platecarpus)))),(Coniasaurus_crassidens,Coniasaurus_gracilodens)));