Length 26 mm. Llŷn, North Wales. March 2016.
View from posterior of intermediate valves iv and v (lower) ; slightly keeled, with flat side slopes.
Thin dorsal layer is brownish tegmentum.
Thick ventral layer is white articulamentum, but thickness exaggerated in this image as specimen slightly tilted showing ventral face obliquely.

KEY ID FEATURES and similar species at: 01 Acanthochitona crinita