Xanthoparmelia exillima (Elix) Elix & Johnston
in Elix, Johnston & Armstrong, Bull. Br. Mus. nat. Hist., Bot. 15(3): 245 (1986).
Basionym: Parmelia exillima Elix, Aust. J. Bot. 29, 3: 357 (1981).
Synonyms: Index Fungorum
Type: xxx.
Thallus: very tightly adnate, somewhat areolate at the center, 4-7 cm broad, yellowish green but darkening with age; lobes sublinear, 0.3-0.5 mm wide, short, dichotomously branched, contiguous to subimbricate; upper surface continuous, emaculate, shiny, transversely cracked with age, densely isidiate, the isidia cylindrical, 0.05- 0.07 mm in diameter, 0.1-0.5 mm high, the tips syncorticate, blackening,, simple to sparsely branched; medulla white; lower surface plane, pale brown, sparsely to moderately rhizinate, the rhizines pale brown, simple, 0.1-0.2 mm long. Pycnidia lacking. Apothecia rare, adnate, 1-2 mm in diameter; spores 4-6 x 7-9 µm.
Photobiont: Trebouxia.
Chemistry: Norlobaridone, loxodin (+/-), usnic acid, atranorin (+/-), unknown Rfc12 (+/-).
Ecology: on rock.
Molecular data: Genbank
Distribution: Database
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