71 Tonicella marmorea COMPARISON Callochiton septemvalvis

71 Tonicella marmorea COMPARISON Callochiton septemvalvis

Callochiton septemvalvis. Orkney, Scotland. April 1976.
The dorsal cuticle (perinotum) of the girdle of C. septemvalvis has densely packed, tessellated, 200μm long, acicular spicules that create a characteristic snake-skin pattern.

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