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Rhizocarpons or map lichens are considered the oldest living organism on Earth, age-estimated at 8,600 years. Specimen from Finland
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Photo credit: © Henri Koskinen / Alamy / Afripics
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Keywords: alga, algae, ascomycota, ascomycotes, aurea, autumn, black, bright, carotenoid, cliff, earth, enigmatic, fall, filamentous, finland, fungi, fungus, gray, green, grey, group, incertae, july, karttajäää, lichen, lichenized, lichens, limestone, living, map, nomenclature, november, oldest, open, orange, organism, pigment, problematica, rhizocarpon, rock, sedis, shore, stone, surface, taxa, taxonomic, taxonomy, terrestrial, trentepohlia