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Xanthoparmelia cravenii 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. (04-10-27). Data set not revised; to be published after submission.

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

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

Taxonomic Literature: Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 223 (1986).

Biogeography: Southern hemispheric (endemic). Continent: Australasia. Checklist records: Australia.

Ecology: Biotroph; lichenized; saxicolous; growing sun-exposed (on rock faces with a southerly aspect), under conditions which are dry (in arid areas of inland Australia, including W.A., N.T., northern S.A. and western N.S.W.).

Thallus: Foliose (foliose to subcrustose), subdivided into main parts, irregular, lobed (foliose to subcrustose); lobes elongate (sublinear-elongate to subirregular), imbricate (or not); separate thallus parts.8-2-(2.5) mm wide. Thallus Size and Differentiation: 3-8 cm in diameter; apex rounded. Upper Surface: Lime green (becoming dark greyish green), matt or glossy (shiny) (towards periphery), rough (often transversely cracked); immaculate; not isidate; not sorediate. Lower Surface: Present, brown (pale tan to light brown, often somewhat darker to smokey-grey near lobe apices); attached by holdfasts (very tightly adnate); rhizinate; rhizines moderately abundant or abundant, brown, not branched.

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages (subpedicellate). Ascocarps: Apothecioid, 1-2-(4) mm in diam.. Margin: Smooth, distinct (thick, entire). Disk: Excavate, brown (dark brown to black-brown).

Ascospores: 8.5-10.5 µm long, 5-6 µm wide.

Conidiomata: Present (pycnidia rarely developed).

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

Secondary Metabolites: Present; throughout the thallus medulla, usnic acid (other secondary metabolites: +/- protoconstipatic acid, +/- constipatic acid, sacbrosin 4,4´-dibutyrate, scabrosin 4-acetate 4´-butyrate, scabrosin 4-acetate 4´-hexanoate, +/- scabrosin 4,4´-diacetate (trace)), metabolite(s) of unresolved identity: present (with or without unidentified scabrosin derivatives and with or without unidentified fatty acids).

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

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

(report generated 04.Okt.2007)

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