United Kingdom Exclusive Economic Zone (EEZ) (inaccurate)
X. carolinensis has been reestablished and its distribution is only North American (US)
Hummon, W.D.; Todaro, M.A. (2010). Analytic taxonomy and notes on marine, brackish-water and estuarine Gastrotricha. <em>Zootaxa.</em> 2392: 1-32. Available for editors [details]
MEDIN. (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN. version 1.0.[details]