Osteichthyes - Therapsida

Synonyms: Biarmosaurus antecessor Chudinov 1960, Biarmosuchus antecessor Tchudinov 1960, Ivantosaurus ensifer Chudinov 1983, Ivantosaurus signifer Tatarinov 1974

Belongs to Biarmosuchus according to C. A. Sidor and B. S. Rubidge 2006

See also Battail and Surkov 2000, Chudinov 1983, Ivakhnenko 2003 and Sigogneau-Russell 1989

Sister taxa: Biarmosuchus tchudinovi, Eotitanosuchus olsoni

Type specimens:

• Biarmosuchus tener: PIN 1785/2, a partial skeleton (distorted skull with lower jaw, and anterior part of the postcranial skeleton). Its type locality is Ezhovo Locality, PIN 1758, which is in an Urzhumian delta plain sandstone/conglomerate in the Russian Federation.
• Biarmosaurus antecessor: PIN 1758/7, a skull. Its type locality is Ezhovo Locality, PIN 1758, which is in an Urzhumian delta plain sandstone/conglomerate in the Russian Federation.
• Biarmosuchus antecessor: PIN 1758/7, a skull.
• Ivantosaurus ensifer: PIN 1758/292, a partial skull (two maxillae and one quadrate). Its type locality is Ezhovo Locality, PIN 1758, which is in an Urzhumian delta plain sandstone/conglomerate in the Russian Federation.
• Ivantosaurus signifer:

Ecology:

Distribution: found only at Ezhovo Locality, PIN 1758

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Specimen images are retrieved through the ePANDDA API.