Corella

Corella is a small genus of basidiolichens in the family Hygrophoraceae. The genus was proposed in 1890 by the Finnish lichenologist Edvard Vainio based on specimens from Brazil, and, for more than a century, only the type species C. brasiliensis was recognised. Genetic studies published in 2013 showed that Corella and the morphologically similar foliose genus Cora belong to separate, well-supported lineages within the subtribe Dictyonemateae, and that their leaf-like thalli evolved independently. high-throughput DNA barcoding of both fresh collections and herbarium specimens up to 130 years old has since revealed at least ten phylogenetic lineages, and extended confirmed records from Costa Rica southward to Brazil and Colombia; however, only C. brasiliensis and C. melvinii have so far been formally described. These lichens form thin, grey-olive, scale- to leaf-like patches on soil-covered rock and other damp substrates in humid montane forests....read more on Wikipedia.