Genus: Gecatogomphius VJUSHKOV & CHUDINOV, 1957
Etymology: Greek, hekaton, “one hundred” and Greek, gomphios, “molar tooth”: hundred molar tooth.
= Geocatogomphius ROMER, 1966 (sic)
= Hecatogomphius OLSON, 1962 (sic)

Species: kavejevi VJUSHKOV & CHUDINOV, 1957
Etymology:
= Hecatogomphius kavejevi OLSON, 1962 (sic)

Holotype: PIN 1156/1

Locality: On the Vyatka 1.0-1.5 m below the landing stage of Nizhnii Novgord (old Gorki), Nizhnii Novgord Province, European Russia.

Horizon: Belebei Suite.

Biostratigraphy: Zone II.

Age: Early Permian.

Material: Fragmentary dentary.