original description
Nisiyama, S. 1935. On Some Fossil Echinoids from Northeastern Japan. Saito Ho-on Kai Museum Research Bulletin 5, 131-172 .
page(s): 164-167; figs. 9a-c, pl. 8: figs. 6-16 [details]
basis of record
Kier, P. M. & Lawson, M. H. 1978. Index of living and fossil echinoids 1924-1970. Smithsonian Contributions to Paleobiology 34, 1-182., available online at https://doi.org/10.5479/si.00810266.34.1
page(s): 109 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Early Miocene [details]