original description
Nisiyama, S. 1968. The echinoid fauna from Japan and adjacent regions. Part II. Special Papers Paleontological Society of Japan 13, 1-491.
page(s): 280- 281; pl. 25: figs. 5-6 [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): 113 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Pliocene [details]
Stratigraphy Koshiba Formation [details]