Biological taxa that first appeared during the Valanginian Age, the geologic time between 139.8 and 132.9 million years ago during the Early Cretaceous era of the Cretaceous Period in the Mesozoic Era.
Biological taxa that first appeared during the Valanginian Age, the geologic time between 139.8 and 132.9 million years ago during the Early Cretaceous era of the Cretaceous Period in the Mesozoic Era.