Genus: Gilmoreteius LANGER, 1998
Etymology: In honor of Charles Gilmore, who first described the type species + teius in reference to the general affinity of this Mongolian form to the actual tegu lizards (Alifanov, 1993)
= Macrocephalosaurus GILMORE, 1943 non TUPI-CALDAS, 1933 (Macrocephalosaurus mariensis, Archosauromorpha, Hyperodapedontidae)
Etymology:

Species: ferruginous (GILMORE, 1943) LANGER, 1998
Etymology:
= Macrocephalosaurus ferrugenous GILMORE, 1943

Holotype: AMNH 6520

Locality: Bayan Zag (= Bayn Dzak, Shabarakh Usu GILMORE, 1943), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Incomplete skull and part of the right ramus.

Referred material:

SULIMSKI, 1975

ZPAL MgR-II/59: Part of the shoulder girdle with a fragment of the clavicle, the posterior cervicals and the proximal part of the humerus.

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Species: sulimskii (emend ALIFANOV, 2000) emend nova
Note: Alifanov, 2000 did not know Langer, 1998 coined Gilmoreteius as a replacement name for the preoccupided Macrocephalosaurus.
= Macrocephalosaurus sulimskii ALIFANOV, 2000

Holotype:

Locality:

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