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Antarctica
1
Aptian
1
Cerro Negro Formation
1
Cibotiaceae
1
Cretaceous
Cyatheaceae
1
Cyatheales
1
Filicophyta
Fossils
1
Lower Cretaceous
South Shetland Islands
1
Tree ferns
1
fern
1
fossil record
1
paleobiogeography
1
paleobotany
1
paleoclimate
1
paleoenvironment
1
paleontology
1
species diversity
1
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