Tread marks

[urbpan]

The marks on the surface of this tinder polypore Fomes fomentarius are the slow deliberate strokes of a mollusk's tongue. The mineralized end of a radula--the feeding instrument of snails and slugs--swiped across, scraping material into the gastropod's mouth.

Comments

[darkest-diary.livejournal.com]

I love your pictures, they are always so informative!