original description
Nisiyama, S. & Hashimoto, W. 1950. A New Echinarachnius from the Tertiary of Hokkaido. Short Papers of the Institute of Geology and Paleontology, Tohoku University (Sendai) 2, 29-42.
page(s): 39-42; figs. 1-3 [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): 69 [details] Available for editors
From editor or global species database
Distribution Japan [details]
Fossil Range Miocene [details]