Obesogammarus crassus, a new Ponto-Caspian gammarid species has been recorded in Poland in the deltaic Vistula system. Notes on its origin, places of acclimatization in Europe, as well as probable ways of invasion are presented. Since the majority of alien gammarid species is still poorly recognized, the authors include a simple key and figures allowing the identification of all Ponto-Caspian gammarid crustaceans recently appearing in Polish waters.
Dataset
NISES: AquaNIS. Editorial Board, 2020. Information system on Aquatic Non-Indigenous and Cryptogenic Species. World Wide Web electronic publication. www.corpi.ku.lt/databases/aquanis. Version 2.36+. Accessed 2020-09-09, more
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