original description
Nisiyama, S. 1940-1941. On the Japaese Species of Echinarachnius. Jubilee Publication in the Commemoration of Professor H. Yabe, M.I.A. Sixtieth Birthday 2, 803-862.
page(s): 822-823; pl. 44: figs. 7-12 [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): 71 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Japanese Saghalien, Oligocene [details]