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): 167-168; pl. 20: figs. 1, 4, pl. 21: fig. 1 [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): 123 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Miocene [details]
Stratigraphy Nanao Formation [details]