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Location
Restrict results to a location - Does the shell have obvious pustules or nodules (circular shape) covering the outer surface?
Yes No Not Sure - Do the pustules or nodules extend onto the beak?
Yes No Not Sure - Does the shell have obvious ridges on the outer surface?
Yes No Not Sure - Are the ridges restricted to the posterior slope?
Yes No Not Sure - Does the animal have rays that appear as:
chevrons
fine, wavy lines extending from the beak to the outer margin
interrupted lines resembling squares
one large blueish green band restricted to the beak
Not sure - Is the beak sculpture Single looped?
Yes No Not Sure - Is the beak sculpture Double looped?
Yes No Not Sure - Does the shell have a dorsal wing?
Yes No Not Sure - Does the shell have teeth?
Yes No Not Sure - Are the lateral teeth complete?
Yes No Not Sure - Is there an interdental tooth in left valve?
Yes No Not Sure - Is the inside of the shell pink or purple?
Yes No Not Sure