Fairly sure this is the Smooth / Yellow Periwinkle. Definitely both smooth and yellow, fairly small (8 mm), and the guides describe it as intolerant of desiccation, and sure, enough, i found them in protected areas only, like under rocks and ledges.
|Photos or sounds?||Yes|
|Is the organism wild/naturalized?||Unknown|
|Does the location seem accurate?||Unknown|
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