basis of record Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp. (look up in IMIS) [details]
context source (MSBIAS) MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0.