Shartegosuchus asperopalatum Efimov, 1988

Dollman, Kathleen N., Clark, James M., Norell, Mark A., Xing, Xu & Choiniere, Jonah N., 2018, Convergent Evolution of a Eusuchian-Type Secondary Palate within Shartegosuchidae, American Museum Novitates 2018 (3901), pp. 1-24 : 4-5

Shartegosuchus asperopalatum Efimov, 1988

HOLOTYPE: PIN 4174 /2 a dorsoventrally crushed skull and mandible of a juvenile individual.

TYPE LOCALITY: Ulan Malgait Formation, Shar Teg, Mongolia.

REFERRED MATERIAL: IGM 200/50, an anterior portion of the skull including rostrum and palatal and dentary bones recovered from Ulan Malgait Formation, Shar Teg, Mongolia.

REVISED GENUS AND SPECIES DIAGNOSIS: *Palatines small and enclose anterior palatal fenestra; *mediolaterally narrow and anteroposteriorly elongate anterior palatal fenestra; *anterior palatal fenestra begins at level of midpoint of suborbital fenestra and ends beyond anterior margin of suborbital fenestrae; *choana positioned posteriorly on the palate and enclosed by pterygoids.

The name Shartegosuchoidea is proposed for the clade Shartegosuchidae + Shantungosuchus , Sichuanosuchus , and Zosuchus , and we define it here as the least-inclusive clade including Shartegosuchus , Shantungosuchus , Zosuchus , and Sichuanosuchus . The definition of Shartegosuchidae is revised as the most inclusive clade that includes Shartegosuchus and Nominosuchus but not Zosuchus .