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Graphis sp.
Crustaceous lichen. It could be G. scripta but it is not clear. It would need microscopy to clear up.
Spotted on the soft bark of a deciduous tree.
Camera Model: NIKON D300. Exposure Time: 1/60 sec.; f/32; ISO Speed Rating: 800. Exposure Bias: 0 EV. Focal Length: 300.0 mm. Flash fired
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