original description
Nisiyama, S. 1966. The Echinoid Fauna from Japan and adjacent Regions. Part I. Paleontological Society of Japan, Special Papers 11, i-ii, 1-277 .
page(s): 237-238; pl. 5: figs. 12-15, pl. 6: figs. 4-5 [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): 39 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Miocene/Early Pliocene [details]
Stratigraphy Komayama Formation [details]