Genus: Arginbaator TROFMOV, 1980
Etymology: In reference to Argin-gol River, Aryaykher aymak, Gobi Desert, Mongolia, near where the fossils were found, and Mongolian, Baaatar, “hero”: Argin River hero.

Species: dimitrievae TROFMOV, 1980
Etymology: In honor of the paleontologist Ye. L. Dimitreyeva, who excavated at the Khobur locality in 1971.

Holotype: PIN 3101/49

Locality: Höövör (Khovboor), Guchin Us Somon, Aryaykher aymak, Gobi Desert, Mongolia.

Horizon: Höövör (Khovboor) Beds.

Biostratigraphy:

Age: ?Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Right mandible with incisor and P2-M1.

Referred material:

PIN 3101/51: Fragment right mandible with P2-P4.

PIN 3101/52: Fragment of right mandible with broken incisor and posterior part of P4.

PIN 3101/56: Fragment of left mandible with alveolus for P2, reduced P3 and P4 turned over to P3.

PIN 3101/58: Fragment of right mandible with strongly worn anterior part of P4 turned over reduced P3, alveolus for incisor.

PIN 3101/59c: Anterior part of left P4.

PIN 3101/71a: Right P4.

PIN 3101/71b: Right P4.

PIN 3101/71c: Left P4.

PIN 3101/73a: Left P4 with fragment of mandible.

PIN 3101/73b: Posterior part of strongly worn P4.

PIN 3101/73c, PIN 3101/73d, PIN 3101/73e, PIN 3101/73f: Fragment of
P4's.

PIN 3101/73g: Fragment left P4.

PIN 3101/73h: Broken right P4.

PIN 3101/50c: Right M1.

PIN 3101/50d: Left M1.

PIN 3101/50a: Right M2 associated with left PX (?P2 or P3)

PIN 3101/50b: Left P1.

PIN 3101/54: Fragment of left maxilla with P1-P3.

PIN 3101/61: Left M2.

PIN 3101/68: Fragment of right maxilla with P1-P4.

PIN 3101/69: Fragment of right maxilla with P2-P3.

PIN 3101/72: Fragment of left maxilla with P2-P3.

GT PST 10-4: Posterior fragment of right P4.

GI PST 10-11: Fragment of right mandible with P2, P3 and anterior part of P4.

GI PST 10-12: Fragment of left mandible with alveolus for P2, reduced P3, P4 turned over P3.

GI PST 10-13: Right P4.

GI PST 10-31: Posterior part of right P4.

GI PST 10-40: Fragment of right mandible with P3, P4 and alveolus for P2.

GI PST 10-11: Right P4 with fragment of mandible.

GI PST 10-60: Left P4 fragment of mandible.

GI PST 10-42: Right M1.

GI PST 10-44b: Right M1.

GI PST 10-15: Right maxilla part of zygomatic arch and P5.

GI PST 10-20: Left M2.

GI PST 10-36: Right ?P5.

GI PST 10-44a: Left ?P5.