Ethalia bysma is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.WoRMS (2012). Ethalia bysma Herbert, 1992. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=567710 on 2012-11-23
Distribution This marine species occurs off South Africa.
References
External links World Register of Marine Species Herbert, D. G. (1992). Revision of the Umboniinae (Mollusca: Prosobranchia: Trochidae) in southern Africa and Mozambique. Annals of the Natal Museum. 33(2):379-459 Herbert D.G. (2015). An annotated catalogue and bibliography of the taxonomy, synonymy and distribution of the Recent Vetigastropoda of South Africa (Mollusca). Zootaxa. 4049(1): 1-98