Cirrusphaera sp
- Citations total:
- 1
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| 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 |