original description
Clark, H. L. (1937). A new sea-urchin from the "Oligocene" of Oregon. <em>Transactions of the San Diego Society of Natural History.</em> 8: 367-374.
page(s): 368; pl. 24: fig. 9 [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): 107 [details] Available for editors
From editor or global species database
Distribution Oregon, U.S.A [details]
Fossil Range Refugian Stage, Oligocene [details]