Invasion

Invasion Description

1st Record: Netherlands/Rhine Delta (river Oude Maas) (2006, Van Haaren and Soors 2009), described as S. vanhaareni).

Geographic Extent

Netherlands/Rhine Delta (river Oude Maas) (2006, Van Haaren and Soors 2009); Netherlands/Rhine Delta (Nieuwe Waterweg) (2006, Van Haaren and Soors 2009); Netherlands/Rhine Delta (Hollandse IJssel)) (2006, Van Haaren and Soors 2009); Harlingen harbour/Netherlands/Wadden Sea (2010, Gittenberger et al. 2010); Antwerp/Belgium/ Antwerp Harbour, Schelde-estuary (2007, Van Haaren and Soors 2009); Brunsbüttel/Germany/Wadden Sea (2009, Buschbaum et al. 2012); Emden/Germany/Ems Estuary (2014, Rohde et al. 2017); Bremerhaven/Germany/Weser estuary (2014, Rohde et al. 2017); France/Raz Blanchard, off Cap de la Hague/France/English Channel (2016, ICES WGITMO 2017, 1 specimen); [Gallions Point Marina, River Thames; amongst Cladophora sp.; 51°30’16.848”N-000°04’18.0948”E; 24 April 2019. 15 females (1.1-3.3 mm), 4 ovigerous females (2.1-2.6 mm), 4 males (2.1-2.2 mm); Gallions Point Marina, River Thames; amongst Cladophora sp.; 51°30’16.848”N-000°04’18.0948”E; 24 April 2019. 15 females (1.1-3.3 mm), 4 ovigerous females (2.1-2.6 mm), 4 males (2.1-2.2 mm); Ashelby 2022).