original description(ofCyclostoma crassum L. Pfeiffer, 1853)Pfeiffer, L. (1853). Description of forty-three new species of Cyclostomacea, from the collection of H. Cuming, Esq. <em>Proceedings of the Zoological Society of London.</em> 19 (234) [“1851”]: 242–251. London [26 July]., available online athttps://biodiversitylibrary.org/page/30680508 page(s): 242 [details]
basis of recordKobelt W. (1902). Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen. 16. Lieferung. Mollusca. Cyclophoridae. <em>Das Tierreich.</em> XXXIX + 662 pp., 1 map. [July]. Berlin (R. Friedländer)., available online athttps://biodiversitylibrary.org/page/1000211 page(s): 136 [details]
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