(13) Schizoporella japonica Ortmann, 1890 Status in U.K. – non-native. Schizoporella japonica was first reported in British waters from Holyhead in July 2010 (Ryland et al. 2014) but Loxton et al. (2017) found an archived sample from Plymouth that backdated the introduction to at least November 2009. It has a near continuous distribution in Scotland (Loxton et al. 2017) and has been present in Orkney since at least May 2011 (Ryland et al. 2014) where it is also found on human-made structures (Want et al. 2017). It has been recorded in scrape and rapid assessment samples from several monitoring programme sites each year since 2014.

Published as part of 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, pp. 46-79 in Management of Biological Invasions 10 (1) on page 62, DOI: 10.3391/mbi.2019.10.1.04, http://zenodo.org/record/11969078