original description
Minato, M. 1950. On Some Palaeogene in Hokkaido. The Journal of the Geological society of Japan 56, 157-159.
page(s): 158-159; figs. 1-2 [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): 108 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Palaeogene [details]
Stratigraphy Early Corbicula bed of the Ishikari Series [details]