Probable L. obtusata.
Single specimen found at innermost end of a shallow landlocked bay in Orkney data.nbn.org.uk/imt/?mode=SPECIES&species=NBNSYS00001… . Pointed, protruding spire resembling those from brackish water in some Scottish lochs and creeks and a tidal river in Suffolk, and those north of the Lofoten Islands.
Height 10.7 mm. Bay of Firth, Orkney, Scotland. March 1976.
Full account at: 02 Differentiation L. obtusata/L. fabalis

marinvert.senckenberg.science/image-browse/