Mesenosaurus

Mesenosaurus is an extinct genus of amniote. It belongs to the family Varanopidae. This genus includes two species: the type species Mesenosaurus romeri from the middle Permian (upper Kazanian) Mezen River Basin of northern Russia, and Mesenosaurus efremovi from the early Permian (Artinskian) Richards Spur locality (Oklahoma, United States). M. romeri’s stratigraphic range is the middle to late Guadalupian while M. efremovi’s stratigraphic range is the Cisuralian.

Mesenosaurus
Temporal range: Permian,
Mesenosaurus romeri
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Family: Varanopidae
Subfamily: Mycterosaurinae
Genus: Mesenosaurus
Efremov, 1938
Type species
Mesenosaurus romeri,
Efremov, 1938
Species
  • M. romeri Efremov, 1938
  • M. efremovi Maho, Gee et Reisz, 2019
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