Late Cretaceous marine reptiles from Antarctica.

Fossil reptile material found during 1983-84 in the sandstone of the late Cretaceous Lopez de Bertodano Formation at Seymour I. included partial skeletons of plesiosaurs and mosasaurids. At this stage, the identification of taxa is tentative and finer diagnosis must wait until the preparation of the material is completed. Their record on Seymour I. indicates that these large marine animals co-existed in the late Cretaceous seas as far south as the coast off the Antarctic Peninsula and must have been able to traverse great areas of oceanic waters when the temperature was more equable. - from Current Antarctic Literature