23 Rissoa parva

23 Rissoa parva

1: ctenidium with about 20 short stout filaments. 2: blackish osphradium. 3: horn coloured operculum. 4. brown opercular disc/lobe. H. 4.7 mm & 3 mm. Anglesey, Wales, May 2016 &  September 2011.

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