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Temporal range: Late Cretaceous, 84.9–66 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Order: Testudines
Suborder: Pleurodira
Family: Bothremydidae
Tribe: Bothremydini
Subtribe: Foxemydina
Genus: Polysternon
Portis, 1882

Polysternon is a genus of turtles in the extinct family Bothremydidae. It was described by Portis in 1882, and contains the species P. provinciale (originally placed in the genus Pleurosternon), which existed during the Cretaceous of what is now France; P. atlanticum, which existed during the Cretaceous of what is now Spain, and a new species, P. isonae, from the Late Maastrichtian of Spain.

The species epithet of P. isonae refers to the municipality Isona i Conca Dellà in Catalonia, where the type specimen was discovered.[1]


  • Polysternon provinciale (Matheron, 1869)
  • Polysternon atlanticum Lapparent de Broin & Murelaga, 1996
  • Polysternon isonae Marmi et al., 2012


  1. ^ J. Marmi, Á.H. Luján, V. Riera, R. Gaete, O. Oms and À. Galobart (2012). "The youngest species of Polysternon: A new bothremydid turtle from the uppermost Maastrichtian of the southern Pyrenees". Cretaceous Research 35: 133–142. doi:10.1016/j.cretres.2011.12.004. 

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