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Antarctica
Aptian
6
Cretaceous
Filicophyta
South Shetland Islands
6
fern
6
Cerro Negro Formation
4
Cyatheaceae
4
Cyatheales
4
Livingston Island
4
new species
4
Byers Peninsula
2
Cibotiaceae
2
Fossils
2
Lower Cretaceous
2
Millerocaulis
2
Osmunda
2
Osmundaceae
2
Pteridophyta
2
Thyrsopteris elegans
2
Tree ferns
2
anatomy
2
fossil assemblage
2
fossil record
2
heterogeneity
2
new genus
2
new record
2
paleobiogeography
2
paleobotany
2
paleoclimate
2
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