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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. (06-05-22). Data set not revised; to be published after submission.

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

Type Information: Basionym: Xanthoparmelia parvoclystoides Elix & J. Johnst. Type: Xanthoparmelia parvoclystoides Elix & J. Johnst.; type specimen label data: J. A. Elix 2252; holo: CBG.

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (scattered, endemic, in hinterland ranges of south-western W.A. and southern S.A.).

Thallus: Foliose (small-foliose to subcrustose), irregular, lobed; lobes elongate or linear (sublinear), imbricate; plane (marginal lobes); separate thallus parts.4-1-(1.5) mm wide. Thallus Size and Differentiation: 5-7 cm in diameter. Upper Surface: Lime green (darkening with age; lobe apices often black-margined), matt; fissurate (older lobes sometimes becoming cracked and areolate (areolae ca. 0.5 mm wide)); fissures transversely oriented or not particularly oriented oriented; immaculate; wrinkled (older lobes sometimes becoming rugulose); not isidate; not sorediate. Lower Surface: Present, brown (pale tan to brown, often darkening to grey-black at lobe apices); attached by holdfasts (very tightly adnate); rhizinate (slender, 0.1-0.2 mm long); rhizines moderately abundant or abundant, brown, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, 1-4 mm in diam.. Margin: Crenulate (becoming crenulate), smooth, distinct (involute, becoming thinner).

Secondary Metabolites: Present; atranorin, norstictic acid (norsticitc acid (major); other secondary metabolite: connorstictic acid (minor)), salazinic acid, and usnic acid.

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

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