Oogensu: Nippanoolithus TANKA, ZELENITSKY, SAEGUSA, IKEDA, DeBUHR & THERRIEN, 2015, 2016
Etymology: In reference Japan (Nippon) and Greek, oo, "egg" and Greek, lithus, "rock or stone."

Oospecies: ramosus TANKA, ZELENITSKY, SAEGUSA, IKEDA, DeBUHR & THERRIEN, 2015, 2016
Etymology: Latin, ramos, referring to the branching ridges on the outer surface of the eggshell.

Holotype: MNHAH D1-040057

Locality: Kamitaki, southeastern Tamba City, Hyogo, Honshu Island, Japan.

Horizon: Lower part of "Lower Formation", Sasayama Group.

Biostratigraphy:

Age: Lower to middle Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Eggshell fragment.

Referred material:

MNHAH D1-040058 t oD1-040063: Eggshell fragments.

 

KUBOTA & TANAKA, 2025

Locality: Tambasasayama and Tamba cities, Hyogo Prefecture, Honshu Island, Japan.

Horizon: Ohyamashimo Formation.

Biostratigraphy:

Age: Lower to middle Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

D1060997, D1060998: Eggshells.

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