SATO, KONISHI, HIRAYAMA & CALDWELL, 2012
Locality: Horotatezawa of Kotabetsu River, Tomamae Town, Hokkaido Island, Japan.
Horizon: Upper Yezo Group.
Biostratigraphy:
Age: Santonian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
NSM PV20024: Partial shell, hind limb and girdle.
Locality: Kaminosawa of Kotanbetsu River, Tomamae Town, Hokkaido Island, Japan.
Horizon: Upper Yezo Group.
Biostratigraphy:
Age: Santonian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
THU g2161: Cervical, rib and radius.
Locality: Nubinaizawa of Kenomai River, Monbetsu area of Hidaka Town, Hokkaido Island, Japan.
Horizon: Upper Yezo Group.
Biostratigraphy:
Age: Santonian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
THU g2163: Partial skull.
Locality: Hanbanosawa of Ikushunbetsu River, Mikasa City, Hokkaido Island, Japan.
Horizon: Upper Yezo Group.
Biostratigraphy:
Age: Santonian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Material: HMG 1066: Costals, centrum, and neural arch.