Xanthoparmelia oleosa (Elix & P. M. Armstr.) Elix & T. H. Nash

Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Bungartz F. (06-05-22). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia oleosa (Elix & P. M. Armstr.) Elix & T. H. Nash. Xanthoparmelia. Synonyms: Parmelia oleosa Elix & P. M. Armstr.; Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia oleosa Elix & P. M. Armstr. Type: Parmelia oleosa Elix & P. M. Armstr.; type specimen label data: J. A. Elix 6397; holo: MEL.

Taxonomic Literature: Mycotaxon 26: 455 (1986).

Biogeography: Southern hemispheric. Continent: Australasia and Northern America. Checklist records: Australia (widely distributed but rarely common in southern and central Australia (W.A., N.T., S.A., N.S.W. and A.C.T.), also on the South Is. of New Zealand (central Otoga), U.S.A. (Arizona) and Mexico), Mexico, New Zealand, and United States and Canada (continental).

Ecology: Lichenized; saxicolous; growing under conditions which are dry.

Thallus: Foliose (small foliose often becoming subcrustose towards centre), irregular, lobed; lobes elongate or linear (sublinear to subirregular), imbricate (barely imbricate); plane; separate thallus parts.8-1.5-(2) mm wide. Thallus Size and Differentiation: 3-6 cm in diameter. Upper Surface: Lime green (becoming greyish black; lobe margins commonly black, particularly towards apices), matt or glossy (shiny) (towards lobe apices); fissurate (older lobes extensively fractured and areolae ca. 1 mm wide formed); immaculate; not isidate; not sorediate. Lower Surface: Present, dark brown (tan to dark brown, often somewhat darker to smoke-grey near lobe apices); attached by holdfasts (very tightly adnate); rhizinate; rhizines moderately abundant, brown, not branched.

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile (sessile to subpedicellate), 1-2-(4) mm in diam.. Margin: Smooth, indistinct (entire). Disk: Excavate, dark brown.

Ascospores: 7-8 µm long, 3.5-4.5 µm wide.

Conidiomata: Present (common).

Conidia: Bifusiform; 5-6 µm long; .5 µm wide.

Secondary Metabolites: Present; usnic acid (other secondary metabolites: protoconstipatic acid, constipatic acid, dehydroconstipatic acid and pertusaric acid).

Spot Tests: Cortex: KC – medulla: K –, C –, KC –, PD –.

UV-Fluorescence: Upper thallus surface – (negative).

(report generated 04.Okt.2007)