Species: ivakhnenkoi MODESTO & REIZSZ, (2002) 2003
Etymology: In honor of M. F. Ivakhnenko for his contributions to the study of the early amniotes of Russia.
Holotype: PIN 162/56
Locality: Glyadnaya Shchel’ya locality, Mezenskii District, Arkhangelsk Region, European Russia.
Horizon: Krasnoshchel’ya Formation, Urzhumian Horizon.
Biostratigraphy: Mezen Faunal Assemblage.
Age: Lower Tatarian Age, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material: Fragmentary skull and dentary.