Traits taxon details
original description
Nagao, T. (1928). Palaeogene fossils of the Island of Kyûshû, Japan, Part II. <em>Science Reports of the Tôhoku Imperial University, 2nd Series, Geology.</em> 12(1): 11-140, pl. 1-17. page(s): 16; pl. 1: figs. 5-6 [details] Available for editors
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): 67 [details] Available for editors
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