A new species, Ramazzottius belubellus, is described from a single lichen sample collected in the Great Smoky Mountains National Park in western North Carolina, U.S.A. The new species is easily distinguishable from all other members of the genus Ramazzottius by the presence of long dorsal, sharp triangular spines not arranged in transverse bands as opposed to small tubercles arranged in bands, or a thin reticulum, or a smooth cuticle present in all other described species of the genus. The new species could be confused with R. baumanni but differs from it by the presence of sharp triangular spines on the dorsal side of the body instead of flat, hemispherical tubercles.

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