Rotaliotina discoidea , common name the discoid delphinula, is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.MolluscaBase eds. (2023). MolluscaBase. Rotaliotina discoidea (Reeve, 1843). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1633240 on 2023-01-30
Description The size of the shell varies between 4 mm and 9 mm. The shell has a discoidal shape, with a flattened spire. The periphery shows two prominent ribs, connected by lattices which a subspinously project. The surface contains clathrate ridges, the interstices of which are finely striated.G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
Distribution This marine species occurs off the Philippines, Papua New Guinea and Australia (Queensland) and Norfolk Island and Lord Howe Island.
References
Jenkins, B.W. 1984. Northern Australian Liotiidae. Australian Shell News 48: 8-9 Huang, Shih-I. (2023). Nomenclatural notes on fossil liotiid taxa and description of Cyclostrema filipino n. sp. from the Philippines (Mollusca: Gastropoda, Liotiidae). Bulletin of Malacology, Taiwan. 46: 24-46.
External links Reeve, L.A. 1843. Monograph of the genus Delphinula. pls 1-5 in Reeve, L.A. (ed). Conchologia Iconica. London : L. Reeve & Co. Vol. 1. World Register of Marine Species