Dictyonema pectinatum

Dictyonema pectinatum is a species of lichen in the family Hygrophoraceae. It is a basidiolichen—a lichen whose fungal partner belongs to the Basidiomycota rather than the more typical Ascomycota. The species was discovered and described in 2012 from specimens found growing on the bark of introduced guava trees in the humid highlands of Santa Cruz Island in the Galápagos. It forms thin, dark olive-green films that appear as neatly arranged, glossy threads lying side-by-side like combed cloth when viewed under magnification. The lichen is known only from a small area of the Galápagos and appears to depend entirely on non-native guava trees for its habitat....read more on Wikipedia.