Dianella is a little-known genus of small freshwater snails with a gill and an operculum, aquatic gastropod molluscs in the family Hydrobiidae.
Distribution These are European freshwater snails; they occur in southeastern Europe, from northern Italy, through the Balkans, to the Black Sea and the Caspian Sea
Description Their relatively big shell has an conic or turriform shape with a common, prominent, spiral sculpture. The radula shows a rhachidian tooth with no basal cusps. Their stomach has a caecal appendix at its pyloric end. They have a Hydrobia-like central nervous system, a simple penis and a characteristic, big seminal receptacle at the end of a prominent spiral of the coiled oviduct.
Species Species within the genus Dianella include:The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 31 July 2014. † Dianella gracilis (Pavlović, 1903) Dianella schlickum Schütt, 1962 Dianella thiesseana Kobelt, 1878 Species brought into synonymy † Dianella crassa (Burgerstein, 1877): synonym of † Prososthenia crassa Burgerstein, 1877 † Dianella nodosa (Burgerstein, 1877): synonym of † Prososthenia nodosa Burgerstein, 1877 † Dianella reticulata (Burgerstein, 1877): synonym of † Prososthenia reticulata Burgerstein, 1877 † Dianella suessi (Burgerstein, 1877): synonym of † Prososthenia suessi Burgerstein, 1877
References
Gude, G.K. (1913). On some preoccupied molluscan names (generic and specific). Proceedings of the Malacological Society of London. 10, 292–293. page(s): 292