06 Rissoa parva

06 Rissoa parva

1: protoconch  lacks costae and brown lines; partly grey-lilac. 2: translucent  pallial tentacle. 3:  translucent metapodial tentacle. 4: operculum rests on purple-black opercular disc. 5: diagnostic brown comma (falciform mark) on labial varix. H 3.2 mm. Llŷn, Wales, March 2015.

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