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Xanthoparmelia dubitata Elix & J. Johnst.

Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Clerc, P. (04-11-01). Data set not revised; to be published after submission.

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

Type Information: Basionym: Xanthoparmelia dubitata Elix & J. Johnst. Type: Xanthoparmelia dubitata Elix & J. Johnst.

Taxonomic Literature: Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 233 (1986).

Biogeography: Southern hemispheric (endemic); upper montane (upland areas in south-eastern and central Australia). Continent: Australasia. Checklist records: Australia (rare but possibly overlooked).

Ecology: Biotroph; lichenized; saxicolous.

Thallus: Crustose (subcrustose, forming convex areolae in thallus centre), subdivided into main parts, irregular; lobes imbricate (rarely imbricate); branches applanate (moderately flattened); separate thallus parts.2-.5-(1) mm wide. Thallus Size and Differentiation: 2-4 cm in diameter. Upper Surface: Lime green (darkening to deep olive-brown or blackish on older lobes near thallus centre), matt; immaculate; not isidate; not sorediate; lobulate (forming branched laciniae in areolate region). Lower Surface: Present, yellow (straw-yellow, often darkening towards lobe apices); attached by holdfasts (very tightly adnate); rhizinate; rhizines sparse, brown (brown to pale brown), not branched.

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, 1-4 mm in diam.. Margin: Smooth, distinct (thick, entire, +/- undulating). Disk: Excavate (deeply concave, becoming +/- flat), brown (dark brown to brown).

Ascospores: 7-9 µm long, 3.5-5.5 µm wide.

Conidiomata: Present (common).

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

Secondary Metabolites: Present; throughout the thallus medulla, norlobaridone and usnic acid.

Spot Tests: Cortex: KC – medulla: K –, C –, KC + pink (rose), PD –.

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

(report generated 04.Okt.2007)

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