Abstract
Menetus dilatatus (Gould, 1841) has been found in July 2005 in the Lipno Reservoir (Bohemian Forest = Šumava Mts., Southern Bohemia, Czech Republic) at 12 particular sites. This locality is about 80 km south of the nearest known locality of Menetus dilatatus and more than 160 km south of the Elbe Lowland where Menetus dilatatus occurs in many sites including the Elbe River. The altitude of the Lipno Reservoir reaches 725 m a.s.l. and is the highest known altitude of Menetus dilatatus in the Czech Republic.
Highlights
Material and MethodsMenetus dilatatus (Gould, 1841) is a native mollusc in the Nearctic Region in the eastern part of the U.S.A. (KERNEY 1999)
Menetus dilatatus has been found at particular localities mainly on the stones on the banks of the water reservoir together mainly with Radix auricularia (Linnaeus, 1758), R. ovata (Draparnaud, 1805) = R. balthica (Linnaeus, 1758) sensu GLÖER & MEIER-BROOK (2003), and Gyraulus albus
Menetus dilatatus was not found but research was directed to unionids and conditions for searching of gastropods living on stones or on the vegetation were not favourable
Summary
Material and MethodsMenetus dilatatus (Gould, 1841) is a native mollusc in the Nearctic Region in the eastern part of the U.S.A. (KERNEY 1999). In the Czech Republic this species has been recorded for the first time in 1994 from a sandpit near Kolín (BERAN 1994). In 2002, Menetus dilatatus has been found in the Otava River in the Orlík Reservoir (Southern Bohemia) in altitude about 350 m a.s.l. This locality is more than 80 km south of localities in the Elbe Lowland (BERAN 2003).
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