Monocorophium acherusicum

Kakkonen, Jenni E., Worsfold, Tim M., Ashelby, Christopher W., Taylor, Andrea & Beaton, Katy, 2019, The value of regular monitoring and diverse sampling techniques to assess aquatic non-native species: a case study from Orkney, Management of Biological Invasions 10 (1), pp. 46-79 : 58

(19) Monocorophium acherusicum (Costa, 1853)

Status in U.K. – cryptogenic.

Monocorophium acherusicum has been widely recorded from the monitoring programme at several marina and pier sites, each year since 2014, from settlement panel and occasionally scrape samples.

Chapman (2000) stated that M. acherusicum is perhaps the most widely distributed and widely introduced estuarine invertebrate in the world with a potential native range in the north-west Atlantic and introduced in all other locations, including the north-east Atlantic. However, Marchini and Cardeccia (2017) were of the opinion that, although potentially native to the North Atlantic, the true origins of M. acherusicum may never be known since it is now so widespread. Here we regard it as cryptogenic in the U.K.