First records of Potamothrix bedoti (Piguet) and Haber speciosus (Hrabé) (Oligochaeta: Tubificidae) from Norway
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Abstract
The first record of Potamothrix bedoti (Piguet, 1913) in Norway is from the eutrophic lake Årungen 34 m a.s.l. (59°45'N, 10°41'E) in the county of Akershus, where 31 mature specimens were collected in the littoral zone from 1.0 to 3.0 m depth in silt and clay sediments. In Scandinavia, the species is also known from Sweden. Six mature specimens of Haber speciosus (Hrabé, 1931) were found in the northern part of the oligotrophic lake Maridalsvannet 149 m a.s.l. (59°59'N, 10°47'E) in the county of Oslo. The worms were found in the littoral zone on sandy bottom with scattered Isoëtes sp. vegetation at approximately 1.5 m depth. The species has earlier not been recorded from Scandinavia.
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