Genus: Isodontosaurus GILMORE, 1943
Etymology:

Species: gracilis GILMORE, 1943
Etymology:

Holotype: AMNH 6647

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: Posterior portions of both rami with teeth.

Referred material:

Locality: Bayan Mandahu, Urad Houqi, Inner Mongolia, China.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

IVPP V10071, V10073-V10075: Incomplete skulls with mandibles.

GAO & NORELL, 2000

Locality: Ukhaa Tolgod, northeastern Nemegt Basin, near the salt extraction settlement of Daus, Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation or the Barun Goyot Formation.

Biostratigraphy:

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

Material:

IGM 3/84 (MAE 96-113): Nearly complete skull with mandibles.

IGM 3/85 –3/89 (MAE 27/93-192, 42/93, 49/93-163, 161/93-40, 94-16-1): Incomplete skulls with mandibles.

Locality: Zos, Nemget Basin, Ömnögov (South Gobi), Mongolian Gobi Desert.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

IGM 3/90 (MAE 95-54): Incomplete skull with mandibles.

 

Locality: Tögrögiin Shiree (= Tugrugeen Shireh, Tugrikin-Shireh locality), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

IGM 3/91 (MAE 261/92-123): Nearly complete skull with partial postcranial skeleton.

IGM 3/92 (MAE 23/93-28): Partial skull with mandibles.

IGM 3/93, 3/94 (MAE 221/93-8, 88/93-19): Partial skulls with mandibles.