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Data Set Maintenance: Data set compiled (from Sheard manuscript for 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 Data set not to be published after submission.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 or basionymous. Taxonomic rank: species. Currently accepted name Rinodina coloradiana H. Magn. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Rinodina coloradiana H. Magn. Type: Rinodina coloradiana H. Magn.

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

Ecology: Biotroph; lichenized; corticolous (pioneer on twigs and branches); episubstratic; growing sun-exposed or partially shaded; under conditions which are dry or moist.

Thallus: Crustose, not subdivided or subdivided into main (areoles) parts, rimose or areolate (primarily areolate) (rimose areolate); lobes rounded at the front; convex; separate thallus parts thin. Thallus Outline: Indistinct or distinct; soon disappearing. Upper Surface: Light grey or grey-brown, matt; not isidate; not sorediate. Lower Surface: Firmly attached attached; attached by the whole lower surface.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile (or contiguous and adnate), abundant, .05-.1 mm in diam.. Margin: Lecanorine, smooth (flexuose), persistent, distinct, 55-75 µm wide; without a thin rim between disk and thalline margin. Disk: Plane or weakly convex to slightly excavate; black. Exciple: White. Parathecium (proper excipulum): Broad (expanding to 10-20 µm above), 5-10 µm wide, white. Amphithecium (thalline excipulum): Present; 50-65 µm wide; photobiont sparse to abundant. Amphithecial Cortex: Present; 5-10 µm wide, 10-20 µm wide at the base; outer cortical layer white; inner cortical layer white. Epithecium: Apical cells spathulate, brownish red. Hymenium: White; not inspers. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 40-90 µm high; white.

Ascospores: Physcia-type, c. 8 per ascus, spores 8 per ascus, ellipsoid, (12.8)-15.1-15.5-15.9-(18.2) µm long, (7.4)-8.5-8.7-8.9-(10) 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 to middle brown (dark torus at maturity), not ornamented.

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