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Rinodina castanomela (Nyl.) Arnold

Data Set Maintenance: Data set compiled (from Sheard manuscript of the Sonoran Desert Flora Vol.2). Data set author(s): Bungartz F. (02-08-30). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Rinodina castanomela (Nyl.) Arnold. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Type: Rinodina castanomela (Nyl.) Arnold.

Taxonomic Literature: Arnold: Verh. zool.-bot. Ges. Wien 37: 121 (1887).

Biogeography: Northern hemispheric; submontane, montane, and upper montane. Continent: Asia-Temperate, Europe, and Northern America. Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Biotroph; lichenized; episubstratic; growing partially shaded; under conditions which are moist or wet; substrate calciferous (limestone, calcareous shale and sandstone).

Thallus: Crustose, subdivided into main (initially verrucae, later distinct areoles) parts, granular (initially) or areolate (primarily areolate) (at maturity, verrucose at first), subsquamulose (areoles with subsquamulose, upturned margins), dispersed throughout and distinctly seperate; lobes ascending; angular at the front; separate thallus parts 1.2-1.6 mm wide; thick. Thallus Outline: Irregular; distinct; margin dentate or lobulate; up-turned; soon disappearing. Upper Surface: Brown or brownish yellow, glossy (shiny), smooth; usually pruinose; pruina whitish; not isidate; not sorediate. Lower Surface: Firmly attached attached; attached by the whole lower surface.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, not emerging (at first), becoming adnate or soon sessile (becoming), moderately abundant (scattered, usually single on areoles), .7-.85 mm in diam.. Margin: Lecanorine, smooth, persistent or excluded, distinct, 95-215 µm wide; without a thin rim between disk and thalline margin. Disk: Plane or weakly convex (and cracked at maturity); black; usually pruinose, pruina white. Exciple: White. Parathecium (proper excipulum): Broad (expanding to 15-40 µm at periphery), 10-15 µm wide, white. Amphithecium (thalline excipulum): Present; 85-200 µm wide; photobiont sparse or abundant. Amphithecial Cortex: Present; 10-20 µm wide; outer cortical layer white (or pigmented); inner cortical layer white (or pigmented). Epithecium: Apical cells spathulate, brown. Hymenium: 70-110 µm high; white; not inspers. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 50-110-(180) µm high; white or lemon (citrine); oil inspersed.

Asci: Clavate; 55-75 µm long, 20-22 µm wide; dehiscence lecanoralean.

Ascospores: Bicincta-type, c. 8 per ascus, spores 8 per ascus, ellipsoid (mature spores constricted at septum), (15.4)-17.4-18-18.5-(20.5) µm long, (8.4)-9.7-10.1-10.4-(11.8) µm wide; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A); wall apically thickened, subapically not thickened, thickened at the septum, becoming pigmented, dark brown or middle brown, not ornamented.

Conidiomata: Absent resp. not observed.

Secondary Metabolites: Present; hopane-6a,22-diol.

Spot Tests: Absent reactions. Upper surface: K – (negative), C –, KC –, PD – cortex: KC –, –, PD – medulla: K – C –, KC –, PD –.

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

(report generated 13.Nov.2007)

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