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Temporal range: Coniacian-Late Eocene (Casamayoran)
~89.3–37.2 Ma
Madtsoia bai.JPG
Madtsoia bai
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Madtsoiidae
Genus: Madtsoia
Simpson, 1933
  • M. bai Simpson, 1933 (type)
  • M. camposi Rage, 1998
  • M. laurasiae Simpson, 1933
  • M. madagascariensis Hoffstetter, 1961
  • M. pisdurensis Mohabey et al, 2011

Madtsoia is an extinct genus of madtsoiid snakes. It is known from the Eocene (Casamayoran and Itaboraian) of Argentina (M. bai), the Paleocene of Brazil (M. camposi), the Late Cretaceous (Campanian) of Spain (M. laurasiae),[citation needed] the Late Cretaceous of India (M. pisdurensis),[1] and the Late Cretaceous (Maastrichtian) of Madagascar and the Coniacian of Niger (M. madagascariensis). Recovered vertebrae of M. pisdurensis are 1.83 centimetres (0.72 in) long and 4.35 centimetres (1.71 in) tall) and pertain to a snake that was approximately 5 metres (16 ft) long.[1]


Fossils of Madtsoia have been found in:[2]

Late Cretaceous


  1. ^ a b c Mohabey, D.M.; Head, J.J.; Wilson, J.A. (2011). "A new species of the snake Madtsoia from the Upper Cretaceous of India and its paleobiogeographic implications". Journal of Vertebrate Paleontology. 31 (3): 588–595. doi:10.1080/02724634.2011.560220. 
  2. ^ Madtsoia at

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