scholarly journals The Towada-Ofudo Tephra found along the Oishi River, Yabukawa, Morioka City, Iwate Prefecture

2021 ◽  
Vol 72 (2) ◽  
pp. 129-138
Author(s):  
Takashi KUDO ◽  
Takayuki UCHINO
Keyword(s):  
2014 ◽  
Vol 70 (2) ◽  
pp. I_1376-I_1380
Author(s):  
Yuriko MATSUBAYASHI ◽  
Sakura ITO ◽  
Ryosuke ISHIDA

Author(s):  
Ren Hirayama

A nearly complete shell of the genus Adocus (Adocidae; Pan-Trionychia; Cryptodira; Testudines) was collected from the late Cretaceous (Turonian) Tamagawa Formation of Kuji Group at Kuji City, Iwate Prefecture, northeast Japan. This turtle shows unique features such as the loss of cervical scute, extreme expansion of marginal scutes overlying costal plates, and exclusion of the humeral- pectoral sulcus from entoplastron. Thus, A. kohaku is erected as a new species. As A. kohaku shows most derived position of A. kohaku within this genus, morphological diversity of the genus Adocus seems to have occurred rather early in its evolution in Eastern Asia.


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