59 Tonicella marmorea COMPARISON Boreochiton ruber

59 Tonicella marmorea  COMPARISON  Boreochiton ruber

Length 20 mm, Anglesey, March 2020. © A. Rowat.
Large B. ruber sometimes closely resemble T. marmorea, but the pale bands on the girdle are mostly narrower than the darker bands and (right) the girdle has a ‘mealy’ appearance.

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