Genus: Hakusanobaatar KUSHASHI, 2008
Etymology: In honor of Mr. Hakusan, around which the Tetori Group is distributed, adn also after Hakusan City, the city in which the discovery locality of the present material is studied, and Mongolian, baatar, 'hero', which is used as a suffix for generic names of many Asian Cretaceous multituberculates.

Species: matsuoi KUSHASHI, 2008
Etymology: In honor of Dr. Hidekuni Matsu, who contributed greatly to paleontological study of the "Kuwajima Kaseki-kabe' site and as a leader of the research group, to management of the research on the fossils from the Kuwajima Formation.

Holotype: SBEI 1736

Locality: "The Kaseki-Kabe" fossil Bluff, 36°12'N, 136°38'E, Tedori River, Near Hakusan City, Shiramine District, Ishikawa Prefecture, Honshu Island, Japan.

Horizon: Upper part of the Kuwajima Formation, Itoshiro Subgroup, Tetori Group.


Age: Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous-Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Late Early Cretaceous.

Material: Isolated right lower incisor, left l2, left and right M1, fragmentary left upper jaw with I3, and P1 to P5, and fragment of right lower jaw with p3 and p4.

Referred material:

SBEI 581: Fragmentary left lower jaw with damaged p4.

SBEI 582: Damaged right upper premolar (probably P2).

SBEI 1519: ?Left p3.

SBEI 1520: Damaged left p4.

SBEI 1526: Fragment of right lower dentary with incisor.

SBEI 1949: Tentatively assigned poorly preserved upper premolar (two ?labial cusps of probably right P5).