29 Callochiton septemvalvis COMPARE  Boreochiton ruber

29 Callochiton septemvalvis COMPARE  Boreochiton ruber

Boreochiton ruber Lower image: live specimen. Dorsal surface of girdle has densely-packed, elongate c. 0.05 – 0.06 mm, club-shaped granules with packed, touching heads giving a mealy appearance. Upper image: portion of girdle after immersion in sodium hydroxide solution. North Yorkshire, England. September 2014. Leg. P. Lightfoot.