original description
Morishita, A. 1957. On some fossil echinoids of Japan, Brissopsis and Eupatagus. Memoirs of the College of Science, University of tokyo, Series B 24, 161-164.
page(s): 163-164; pl. 1: figs. 7-8 [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): 114 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Middle Miocene [details]