Cumanotus beaumonti is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cumanotidae.Gofas, S. (2004). Cumanotus beaumonti (Eliot, 1906). In: MolluscaBase (2017). Accessed on 2018-01-16.
Distribution This species was described from Jennycliff Bay, Plymouth Sound, Devon, England, . It has been reported from the Irish Sea (including the Douglas, Isle of Man Marine Nature Reserve) Scotland and Norway.Picton, B.E. & Morrow, C.C. (2016). Cumanotus beaumonti (Eliot, 1906). [In] Encyclopedia of Marine Life of Britain and Ireland. Accessed on 2018-01-16
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