Invasion

Invasion Description

1st Record? Netherlands/Rhine, Meuse, Scheldt estuaries (1930, Wolff 1973, previously reported as P. ciliata, 2-35 PSU)

Geographic Extent

Netherlands/Rhine, Meuse, Scheldt estuaries (1930, Wolff 1973, previously reported as P. ciliata, 2-35 PSU); Langeoog, Island E Of Juist/Germany/North Sea (1987, USNM 175181, U.S. National Museum of Natural History 2015); Germany/Jade-Weser Delta (1949, Michaelis 1978); Brtish Isles/North Sea-English Channel (Radashvesky 2012)