Tashiro, M; Matsuda, T. (1983). "A study of the Pterotrigoniae from Japan". Memoirs of the Faculty of Science, Kochi University, Series e, Geology. 4: 13–52. Archived from the original on 25 October 2021. Retrieved 25 October 2021.
Tashiro, M; Matsuda, T. (1983). "A study of the Pterotrigoniae from Japan". Memoirs of the Faculty of Science, Kochi University, Series e, Geology. 4: 13–52. Archived from the original on 25 October 2021. Retrieved 25 October 2021.