Fossil range: Late Cretaceous - Eocene
Fossil vertebrate of Madtsoia bai.
| Scientific classification
Madtsoia is an extinct genus of madtsoiid snake. It is known from the Eocene of Argentina (M. bai), the Paleocene of Brazil (M. camposi), the Late Cretaceous (Campanian) of Spain (M. laurasiae), and the Late Cretaceous (Campanian-Maastrichtian) of Madagascar and possibly Niger (M. madagascariensis).
- Snakes: The Evolution of Mystery in Nature by Harry W. Greene
- In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods by Nicholas C. Fraser and Hans-Dieter Sues