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Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Bungartz F. (06-05-16). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia metastrigosa (Elix) Hale. Xanthoparmelia. Synonyms: Parmelia metastrigosa Elix; Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia metastrigosa Elix. Type: Parmelia metastrigosa Elix; type specimen label data: J. A. Elix 4627; holo: MEL.

Biogeography: Southern hemispheric; subalpine. Continent: Australasia. Checklist records: Australia (endemic, only known from Mt Canobolas, N.S.W., where it is particularly common) and New Zealand.

Ecology: Lichenized; saxicolous (on rock and pebbles); growing sun-exposed, under conditions which are moist.

Thallus: Foliose, isotomic-dichotomous or irregular (dichotomously or irregularly branched), lobed; lobes elongate or linear, ascending (subascending or not) or imbricate; plane or convex (commonly convex); separate thallus parts 1.5-4-(5) mm wide. Thallus Size and Differentiation: 7-12 cm in diameter. Upper Surface: Lime green (lobe margins commonly black), glossy (shiny) (becoming dull), smooth; immaculate or maculate; not isidate; not sorediate. Lower Surface: Present (+/- canaliculate), pale brown or dark brown; attached by holdfasts (loosely adnate); wrinkled; rhizinate; rhizines sparse or abundant (very dense), pale brown or dark brown (concolorous with lower surface), not branched or branched, dichotomously branched.

Reproduction Strategy: With sexual (and possible asexual) stages (subpedicellate). Ascocarps: Apothecioid, soon sessile, 10-12 mm in diam.. Margin: Crenulate, indistinct. Disk: Excavate to weakly convex, brown or dark brown.

Secondary Metabolites: Present; norlobaridone and usnic acid (other secondary metabolites: hypostictic acid, hyposalazinic acid and hypoconstictic acid).

Spot Tests: Cortex: KC – medulla: K –, + yellow, or + yellow changing to red (yellow then pale red), C –, KC – or + pink, PD –.

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