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): 69 [details] Available for editors
status sourceHall, C. A. Jr. 1962. Evolution of the echinoid genus Astrodapsis. University of California Publications in Geological Sciences, 40(2), 47-180., available online athttps://archive.org/details/evolutechin00hall page(s): 71-73 [details]