Title: Last Universal Community Ancestor: depicting a photosimbiotic community as a primordial life-setting community on early 
Earth

Abstract: LIGHT harvesting systems should be ancient energy producing mechanisms. Chlorophyllated micro-organisms appear to 
exist in early Earth. An epilithic community from the hyper-arid Atacama Desert containing black fungi+chlorophyllated bacteria 
suggests melanoidins to switch UV into photosynthetic light by fluorescence, a PHOTOSYMBIOTIC community, suitable to exist 
even in high-UV planetary surfaces.