31. Lithoglyphus fuscus (C. Pfeiffer, 1828)

Findings in Serbia.

Lithoglyphus fuscus: Möllendorff (1873); Karaman (2001) (L. Dokić 1879 collection).

Morphology. Small-sized snails up to 10 mm high. Globulous shell has pointed apex and 4-4.5 whorls. Suture is deep, aperture is ovate and angled at the top, with sharp peristome. Umbilicus is closed. For more details see Glöer (2019: 174, fig. 216).

Distribution and ecology. Central European species. In Serbia recorded in the Danube, Sava and Morava Rivers, and in pools near Paraćin. All those records are from the 19 th century.

Other remarks. Type species of the genus. Bole (1981) argued that Lithoglyphus fuscus is a subspecies of L. naticoides characteristic for northern Balkan. Considering all known records are from the 19 th century, this species could be considered as non-present in the region nowadays. Moreover, Glöer (2019) considers the presence of this species only in the type locality in Slovenia (Ljubljana). On the IUCN Red List it has been assessed as LC (Sket & Cioboiu 2010).