Mean atmospheric O2
Geologic Time Scale
Small predatory theropod dinosaurs of the genus Masiakasaurus explore a forest of cypress, ferns and horsetails 70 million years ago in what is today Madagascar.
Masiakasaurus was a small-bodied carnivore that grew to about six feet long and weighed up to 200 pounds. Its front teeth were projected forward, giving it a buck toothed appearance, an adaptation that is believed to have aided it in catching fish and other small prey.
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