Genus: Callorhinchus LACEPEDE, 1798
Etymology:

Species: orientalis OTA, NISHIMURA, KOBAYASHI & MORIKI, 2025
Etymology: Latin, orientalis, "eastern" in reference to the speicmen found in Japan.

Holotype: HMG-2013

Locality: Pankerusano-sawa Creek, Tomiuchi District, Hobetsu area, Mukawa Town, Hokkaido Island, northern Japan.

Horizon: Hakobuchi Formation, Yezo Group.

Biostratigraphy:

Age: Late Cretaceous.

Material: A nearly complete left palatine tooth plate.