Echinoidea name details
original description
Girard, C. F. (1852). Description of two new genera and two new species of Planaria. <em>Proceedings of the Boston Society of Natural History.</em> 4: 210-213., available online at https://www.biodiversitylibrary.org/page/8870920 page(s): 213-214 [details]
basis of record
Mortensen, T. (1951). A Monograph of the Echinoidea. V, 2. Spatangoida II. Amphisternata II. Spatangidæ, Loveniidæ, Pericosmidæ, Schizasteridæ, Brissidæ, 593 pp., C. A. Reitzel, Copenhagen. page(s): 152-157 [details]
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