original description(ofNymphaster rugosus Spencer, 1905 †)Spencer, W. K. (1905). A Monograph of the British Fossil Echinodermata from the Cretaceous formations. Volume second: The Asteroidea and Ophiuroidea. <em>Paleontographical Society Monographs.</em> 2(4): 91-132., available online athttps://biodiversitylibrary.org/page/20756140 page(s): 94, plate 29 [details]
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