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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. (06-05-15). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia metaclystoides (Kurok. & Filson) Elix & J. Johnst. Xanthoparmelia. Synonyms: Parmelia metaclystoides Kurok. & Filson; Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia metaclystoides Kurok. & Filson. Type: Parmelia metaclystoides Kurok. & Filson; type specimen label data: R. B. Filson 11783; holo: MEL.

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (relatively common in southern Australia (W.A., S.A., N.S.W., A.C.T., Vic. and Tas.)) and New Zealand.

Ecology: Lichenized; lignicolous (dead wood) or saxicolous; growing under conditions which are dry.

Thallus: Foliose, irregular, lobed; lobes imbricate (sparingly imbricate); rounded (subrotund at apices) at the front; plane (marginal lobes); separate thallus parts.7-2.5-(3.5) mm wide. Thallus Size and Differentiation: 6-10-(12) cm in diameter. Upper Surface: Lime green (pale yellow-green, darkening to olive-green or blackish; lobe margins black), matt; immaculate; wrinkled (older central lobes becoming rugose and blackened); not isidate; not sorediate; lobulate (lobules occasionally developing in thallus centre). Lower Surface: Present, pale brown (pale ivory to pale brown, blackening near lobe apices); attached by holdfasts (adnate to tightly adnate); rhizinate; rhizines moderately abundant, black or brown, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Soon sessile, up to 7 mm in diam.. Margin: Indistinct (involute, becoming undulating). Disk: Plane, brown or dark brown.

Secondary Metabolites: Present; norstictic acid, salazinic acid (other secondary metabolites: connorstictic acid, +/- constipatic acid and +/- protoconstipatic acid), and usnic acid.

Spot Tests: Cortex: KC – medulla: K + yellow changing to red, C –, PD + orange (yellow-orange).

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