original description
Tanaka, K. & Okubo, M. 1954. On some echinoids from the Paleo-Cretaceous of the Yuasa District in the Kii Peninsula and of the Yatsushiro District in Kyushu. The Journal of the Geological Society of Japan, new series 60, 215-227.
page(s): 220; pl. 7: fig. 3 [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): 101 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Barremian, Early Cretaceous [details]