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Rinodina athallina H. Magn.

Data Set Maintenance: Data set compiled (from Sheard manuscript for Sonoran Desert Flora Vol. 2). Data set author(s): Bungartz F. (02-08-29). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Rinodina athallina H. Magn. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Type: Rinodina athallina H. Magn.

Biogeography: Montane and upper montane. Continent: Northern America (endemic in the West). Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Biotroph; lichenized; endosubstratic or episubstratic; growing sun-exposed or partially shaded; under conditions which are dry or moist; substrate calciferous (calcareous sandstone).

Thallus: Crustose, subdivided into main (areoles in episubstratic thalli) parts, areolate (primarily areolate) (if well developed and episubstratic); lobes angular at the front; plane or convex (rugose); separate thallus parts.85-.9 mm wide; thin or thick (if episubstratic). Thallus Outline: Orbicular; distinct; soon disappearing. Upper Surface: Light grey (to ochraceous), matt or glossy (shiny); not isidate; not sorediate.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate (becoming) or soon sessile, abundant, .6-1.1 mm in diam.. Margin: Lecanorine, smooth, persistent, 80-115 µm wide; without a thin rim between disk and thalline margin. Disk: Plane or weakly convex (and cracked); black. Exciple: White. Parathecium (proper excipulum): 15-25 µm wide, white. Amphithecium (thalline excipulum): Present; 70-80 µm wide; photobiont sparse or abundant. Amphithecial Cortex: Present; 15-20-(30) µm wide; outer cortical layer white; inner cortical layer white. Epithecium: Apical cells spathulate, brownish blue (N+ and K+ violet), insoluble in 10% KOH (violet), cell pigment reacting with 10% KOH. Hymenium: 90-150 µm high; white; not inspers. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 70-100-(125) µm high; white or lemon (citrine).

Asci: Clavate; 65-70 µm long, 20-30 µm wide; dehiscence lecanoralean.

Ascospores: Beltraminia-type, c. 8 per ascus, spores 8 per ascus, ellipsoid, (15.9)-22.5-23.8-22.5-(24.2) µm long, (7.3)-9.6-9.9-10.2-(12.6) µm wide; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A); wall apically not thickened, subapically not thickened, not thickened at the septum, becoming pigmented, dark brown or middle brown, not ornamented.

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

Secondary Metabolites: Not detected or present (not detected with TLC).

(report generated 13.Nov.2007)

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