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Xanthoparmelia exuviata (Kurok.) Hale

Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Clerc, P. (04-11-02). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia exuviata (Kurok.) Hale. Xanthoparmelia. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia exuviata Kurok. Type: Xanthoparmelia exuviata (Kurok.) Hale.

Taxonomic Literature: Mycotaxon 20:79 (1984).

Biogeography: Southern hemispheric (endemic, rare); upper montane (in upland regions). Continent: Australasia. Checklist records: Australia.

Ecology: Biotroph; lichenized; saxicolous; growing under conditions which are dry (in arid or subarid areas or areas of moderate rainfall).

Thallus: Subdivided into main (short) parts, irregular; lobes linear (sublinear), imbricate (or not); branches applanate (moderately flattened); separate thallus parts 1.5-3 mm wide. Thallus Size and Differentiation: 4-9 cm in diameter. Upper Surface: Lime green, matt; immaculate; wrinkled (lobes becoming rugulose, cracked and +/- areolate); isidiate (numerous, apices epicorticate and only rarely erumpent); isidia cylindrical or inflated (+/- inflated at apices), not ramified or ramified (warty to sparingly branched), sparse; not sorediate. Lower Surface: Present, brown (pale brown to brown); attached by holdfasts (loosely adnate); rhizinate (0,1-0,2 mm long); rhizines sparse, brown (concolorous with lower surface).

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages (no mature ascospores seen). Ascocarps: Apothecioid, soon sessile, 2-3 mm in diam.. Margin: Isidiate. Disk: Excavate, brown (brown to dark brown).

Conidiomata: Present (common).

Conidia: Bifusiform; 6-7 µm long; .5 µm wide.

Secondary Metabolites: Present; throughout the thallus medulla, usnic acid (other secondary metabolites: exuviatic acid A and exuviatic acid B).

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

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

(report generated 04.Okt.2007)

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