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[dinosaur] Possible Japanese Ceratopsid tooth, Protoceratops ontogeny

Makoto Manabe1, Takanobu Tsuihiji2, Yuka Miyake3 and Toshifumi Komatsu4 (2017)

A possible ceratopsid tooth from the Upper Cretaceous of Kyushu, Japan

Bulletin of the National Museum of Nature and Science, Series B


Abstract: A fragmentary tooth is reported from the Campanian section of the Upper Cretaceous

Himenoura Group on Shimokoshikishima Island of Kyushu, Japan. The tooth specimen is identified

as the medial root of a ceratopsid dinosaur. If this identification is correct, it represents a rare

example of the clade in Asia

Mototaka SANEYOSHI, Shinpei MISHIMA, Khishigjav TSOGTBAATAR, and Buuvei MAINBAYAR:

Morphological changes of Protoceratops andrewsi skull with ontogenetic processes

Naturalistae 21: 1-6 (Feb. 2017)


Abstract: Replica skull specimens of Protoceratops andrewsi (Neoceratopsian, Protoceratopsidae),

which stored in Okayama University of Science, are described in the study. Specimens show baby,

subadult and adult, respectively. From baby to subadult, parietal and squamosal are increased to posterior

side. From subadult to adult, the squamosal increased more than parietal, and the frill expands

to dorsal side. The frill form of Protoceratops andrewsi can be characterized by these ontogenetic

changes of parietal and squamosal.