Hippeutis complanatus ( Linnaeus, 1758 )

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 : 32

64. Hippeutis complanatus ( Linnaeus, 1758)

Findings in Serbia.

Hippeutis complanatus : Hesse (1929); Karaman (2001); Karaman & Karaman (2007); Novaković (2016 pers. comm.); Gojšina (2021 pers. comm.).

Common name. Flat ramshorn.

Morphology. Small snails, up to 5 mm diameter. Flattened and shiny translucent shell is finely striated and consists of 3–4 rapidly increasing whorls. The last whorl is large and medial keeled. Umbilicus is 1/6–1/4 of shell diameter. For more details see Welter-Schultes (2012: 65, figure at the bottom of the page).

Distribution and ecology. Holarctic species up to 1100 m.a.s.l. Inhabits stagnant and slow-flowing waters rich in vegetation. Does not tolerate droughts ( Welter-Schultes 2012). Rare in Serbia, it was recorded in the Danube, Jezava and Plazović Rivers, and a small pond near the Nera River ( Bela Crkva Municipality).

Other remarks. Due to threatened and polluted habitats the species has scarce findings across its distribution range. Considered as vulnerable species in Austria and Switzerland ( Welter-Schultes 2012). On the IUCN Red List it has been assessed as LC ( Killeen & Seddon 2011 b).

Genus Segmentina J. Fleming, 1818