Campanian Cretaceous 14 Maastrichtian 10 Antarctica 8 Antarctic Peninsula 6 James Ross Island 6 West Antarctica 6 Argentina 4 Atlantic Ocean 4 Atlantic Ocean (South) 4 Calcareous nannofossils 4 Late Cretaceous 4 Paleoceanography 4 Patagonia 4 Snow Hill Island 4 South America 4 Upper Cretaceous 4 fossil record 4 magnetostratigraphy 4 morphology 4 nanofossil 4 paleoceanography 4 paleoenvironment 4 Anilioidea 2 Anilius 2 Antarctica, James Ross Island 2 Arctic and Antarctic 2 Austral Basin 2 Austral basin 2 Australophis 2