Cooke, C. W. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254A, 1-44., available online athttps://pubs.usgs.gov/pp/0254a/report.pdf page(s): 29; pl. 11: figs. 11-13 [details]
original descriptionCooke, C. W. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254A, 1-44., available online athttps://pubs.usgs.gov/pp/0254a/report.pdf page(s): 29; pl. 11: figs. 11-13 [details]
basis of recordKier, P. M. & Lawson, M. H. 1978. Index of living and fossil echinoids 1924-1970. Smithsonian Contributions to Paleobiology 34, 1-182., available online athttps://doi.org/10.5479/si.00810266.34.1 page(s): 97 [details] Available for editors
From editor or global species database
Distribution Arkansas, U.S.A [details] Fossil Range Campanian/Santonian?, Late Cretaceous [details]