Genus: Phaanthosaurus TCHUDINOV & VJUSHKOV, 1956
Etymology: Greek, phaanthen, “clear, conspicuous” and Greek, sauros, “lizard”: Distinct lizard.

Species: ignatjevi TCHUDINOV & VJUSHKOV, 1956
Etymology:

Holotype: PIN 1025/21

Locality: Spasskoye Village, Vetluga River, Gor'kiy oblast, Nizhnii Novgorod Province, European Russia.

Horizon: Base of the Vetluga series, Vokhmian Gorizont.

Biostratigraphy:

Age: Early Triassic.

Material: Fragmentary dentary.

Referred material:

PIN 1025/21: Dentary.

PIN 1025/20: Postdental portion of the lower jaw.

And fragments of lower jaws.