63. Planorbis planorbis (Linnaeus, 1758)

Findings in Serbia.

Planorbis marginatus: Möllendorff (1873) .

Planorbis planorbis: Hesse (1929); Jaeckel et al. (1958); Jovanović (1990); Karaman (2001; 2001 a, 2005); Simić & Simić (2004); Živić et al. (2005); Karaman & Karaman (2007); Savić et al. (2016); Živić (2020).

Common name. Common ramshorn, margined ramshorn.

Morphology. Medium-sized snail (up to 15 mm diameter). Keeled shell is flattened and translucent, while keel position makes its lower side almost flat. For more details see Welter-Schultes (2012: 69, figure in the middle of the page).

Distribution and ecology. Holarctic species up to 1900 m.a.s.l. (In Serbia up to 650 m. a.s.l.). Prefers standing and slow-flowing waters with a muddy substrate and plenty of vegetation (Glöer 2019). The snail inhabits both, permanent and temporary habitats and tolerates eutrophication. In Serbia, it is one of the most common freshwater snails in larger and medium-sized rivers and ponds. It has been reported from the Danube River, ponds and marshes near the Danube and Tamiš Rivers and DTD canals in the Pannonian part. It was also recorded in Toplica, Temska, and Nišava Rivers.

Other remarks. This species can be confused with Planorbis carinatus if the keel is shifted towards the medial part of the whorls (Glöer 2019). On the IUCN Red List it has been assessed as LC (Killeen et al 2011 a).