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): 159-162; figs. 57-59, pl. 19: figs. 1-2, pl. 21: fig. 4 [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): 124 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Middle Miocene [details]
Stratigraphy Tsunaki Formation [details]