MolluscaBase eds. (2024). MolluscaBase. Cyclotus (Opisthoporus) W. H. Benson, 1851. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=997346 on 2024-03-28
additional sourceKobelt 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): 213 [details]
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