Holotype: SBEI-337

Locality: Kuwajima “Kaseki-kabe” (Fossil-bluff), Shiramine, Ishikawa Prefecture, Honshu Island, Japan.

Horizon: Kuwajima Formation, Tetori Group.

Biostratigraphy:

Age: Valangian or Hauerivian Stage, Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: A partial skeleton, including carapace, plastron, and caudal vertebrae.