Anisus (Anisus) leucostoma (Millet, 1813)

Marković, Vanja, Gojšina, Vukašin, Novaković, Boris, Božanić, Milenka, Stojanović, Katarina, Karan-Žnidaršič, Tamara & Živić, Ivana, 2021, The freshwater molluscs of Serbia: Annotated checklist with remarks on distribution and protection status, Zootaxa 5003 (1), pp. 1-64 : 29

Anisus (Anisus) leucostoma : Karaman & Karaman (2007).

Common name. Button ramshorn, white-lipped ramshorn snail.

Morphology. Small-sized snail (up to 9 mm diameter). Very shiny, flattened shell is bluntly keeled, last whorl is slightly wider than penultimate whorl. For more details see Welter-Schultes (2012: 58, figure at the bottom of the page).

Distribution and ecology. Western Palearctic species up to 1800 m.a.s.l. Lives in various habitats, yet it is typical in periodical small stagnant waters, as it tolerates longer periods of drought (Welter–Schultes 2012). Scarce findings in Serbia, all of it from the 20 th century. Danube and Jezava Rivers, DTD canal, and ponds in Deliblatska peščara sandy area.

Other remarks. Some authors considered it as conspecific with Anisus spirorbis ( Linnaeus, 1758) . Outside Europe the species is also found in Iran ( Glöer 2019). On the IUCN Red List of threatened species it has been assessed as LC (Killeen & Seddon 2011 a).