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The Ponto-Caspian amphipod Echinogammarus trichiatus (=Chaetogammarus trichiatus) was found for the first time in Slovakia (22 August 2007, near Bratislava) and in Hungary (15 September 2009, near Rajka). This range expansion is probably a result of a recent downstream spread of the Upper-Danubian populations. Our records indicate that the species can inhabit artificial ripraps as well as near-natural gravel banks, and co-occurs with its relatives already present. Suitable habitats can be found all along the Middle-Danube, so further spread of the species is anticipated.

aquatic invasions

First record of the Ponto-Caspian amphipod Echinogammarus trichiatus (Martynov, 1932) (=Chaetogammarus trichiatus) (Crustacea: Amphipoda) for the Middle-Danube (Slovakia and Hungary)