Tamura, M. (1978). A new species of Pterotrigonia from Upper Cretaceous Onogawa Group, Japan. Memoirs of the Faculty of Education, Kumamoto University, Natural Science. 27: 81-84.
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Tamura, M.
1978
A new species of <i>Pterotrigonia</i> from Upper Cretaceous Onogawa Group, Japan
Memoirs of the Faculty of Education, Kumamoto University, Natural Science