The Echinoid Directory

Koninckocidaris silurica Jackson, 1912; holotype, University of Rochester, New York. From Jackson, R. T. 1912. Phylogeny of the Echini, with a revision of Palaeozoic species Memoirs of the Boston Society of Natural History 7, 491 pp. 76 pls. Internal surface of aboral side

Specimen 52 mm tall.