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Xanthoparmelia praegnans (Elix & P. M. Armstr.) 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@ Bungartz F. (06-05-24). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia praegnans (Elix & P. M. Armstr.) Elix & J. Johnst. Xanthoparmelia. Synonyms: Parmelia praegnans Elix & P. M. Armstr.; Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia praegnans Elix & P. M. Armstr. Type: Parmelia praegnans Elix & P. M. Armstr.; type specimen label data: R. B. Filson 1562a & S. Filson; holo: MEL.

Taxonomic Literature: Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 308 (1986).

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (relatively common, endemic, in inland areas of Australia (W.A., N.T., S.A. and Qld)).

Ecology: Lichenized; saxicolous; growing under conditions which are dry.

Thallus: Foliose (small foliose to subcrustose), irregular, lobed; lobes linear (sublinear), imbricate (or not); plane; separate thallus parts.5-1-(2) mm wide. Thallus Size and Differentiation: 2-4 cm in diameter. Upper Surface: Lemon (citrine), matt; fissurate (older lobes cracked, becoming areolate); fissures not particularly oriented oriented; immaculate; isidiate (numerous, isidia apices epicorticate, becoming inflated and erumpent but not sorediose); isidia globular or cylindrical (becoming subcylindrical), ramified; not sorediate. Lower Surface: Present, brown or pale brown; attached by holdfasts (tightly adnate); rhizinate; rhizines moderately abundant, brown or pale brown (concolorous with lower surface), not branched.

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, 2-3 mm in diam.. Margin: Smooth, distinct (and entire). Disk: Excavate (becoming undulating), dark brown.

Ascospores: 7-8 µm long, 5-5.5 µm wide.

Conidiomata: Absent resp. not observed (not seen).

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

Spot Tests: Cortex: KC – medulla: K + yellow changing to red, C –, KC –, PD + deep yellow.

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

(report generated 04.Okt.2007)

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