Peltula
Introduction '''''Peltula''''' is a genus of small dark brown to olive or dark gray squamulose lichens that can be saxicolous (grow on rock)) or terricolous (grow on soil). Members of the genus are commonly called '''rock-olive lichens'''. They are cyanolichens, with the cyanobacterium photobiont from the genus ''Anacystis''. They are umbilicate with flat to erect squamule lobes that attach from a central holdfast or cluster of rhizenes. Lichen spot tests are usually negative.The thallus of members of the genus are similar to members of ''Heppia'', ''Psora'', and ''Placidium'', although the first genus has cyanobacteria from the genus ''Scytonema'', and the latter two genera have green algae as the photobiont.The genus is in the family Peltulaceae.
Species *''Peltula auriculata'' *''Peltula bolanderi'' *''Peltula brasiliensis'' *''Peltula capensis'' *''Peltula cataractae'' *''Peltula clavata'' *''Peltula cylindrica'' *''Peltula daurica'' *''Peltula euploca'' *''Peltula hassei'' *''Peltula imbricata'' *''Peltula impressa'' *''Peltula inversa'' *''Peltula leptophylla'' *''Peltula lobata''  – Europe*''Peltula lobulata''  – China*''Peltula obscurans'' *''Peltula obscuratula'' *''Peltula olifera'' *''Peltula omphaliza'' *''Peltula patellata'' *''Peltula placodizans'' *''Peltula polycarpa''  – China*''Peltula polyphylla''  – China*''Peltula pseudoboletiformis''  – China*''Peltula radicata'' *''Peltula rodriguesii'' *''Peltula steppae'' *''Peltula submarginata''  – China*''Peltula zahlbruckneri''
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