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| details | Hauterivian | Barremian | Volkheimer,W. Upper Jurassic and Lower Cretaceous microfloras of Latin America. | 1980 | |
| details | Late Valanginian | Hauterivian | Aguirre-Urreta,M.B. et al. Advances in the biostratigraphy of the Agrio Formation (Lower Cretaceous) of the Neuqu©n Basin, Argentina: ammonites, palynomorphs and calcareous nannofossils. | 1999 |