The Echinoid Directory

Conoclypus aequidilatatus Agassiz; Holotype, BMNH E41788-c; from Durham & Melville (1957: fig. 5). Internal view of oral surface (above) and vertical section (below).

Durham, J. W. & Melville, R. V. 1957. A classification of echinoids Journal of Paleontology 31(1): 242-272.