Invasion

Invasion Description

None

Geographic Extent

Sweden/Skagerrak (Roch 1931, as T. borealis, cited by Turner 1966); Near Lysekil, Kristineberg Zoological Station/Sweden/Gulmarfiord (Museum of Comparative Zoology 2009; Borges 2013; Appelqvist et al. 2014; Borges et al. 2014); Norway/inner part Oslo Fjord (MCZ, Malacology 280042, (Museum of Comparative Zoology 2013)