MolluscaBase eds. (2024). MolluscaBase. Cyclostremiscus planospiratus (P. P. Carpenter, 1857). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=575475 on 2024-09-06
basis of recordKeen, A. M. (1971). Sea Shells of Tropical West America. Marine mollusks from Baja California to Peru. ed. 2. Stanford University Press. xv, 1064 pp., 22 pls.[details]
additional sourceKeen, A.M. (1968). West American mollusk types at the British Museum (Natural History). IV. Carpenter's Mazatlan collection. <em>The Veliger.</em> 10(4): 389-439, pl. 55-59., available online athttp://biodiversitylibrary.org/page/42414196[details]