Racoleus
''Racoleus'' is a genus of two species of lichen-forming fungi of uncertain family (biology), familial placement in the order Capnodiales. Both species of ''Racoleus'' are filamentous lichens with ''Trentepohlia (alga), Trentepohlia'' (a genus of green algae) as the partner. The lichens form thallus, thalli in the form of felt-like, blackish-brown cushions that grow under shaded conditions on siliceous rocks. Taxonomy The genus was circumscription (taxonomy), circumscribed by the lichenologists Rolf Santesson and David Leslie Hawksworth in 2011. The name ''Racoleus'' is derived by combining elements from two other genera: 'Rac' from ''Racodium'' and 'coleus' from ''Cystocoleus''. This naming reflects the genus's shared characteristics with both ''Racodium'' and ''Cystocoleus'', which are also filamentous lichens. The authors placed the genus in the order Capnodiales because of morphological characteristics. ''Racoleus'' was monotypic until 2023, when a second species was added ...
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