Rinodina boulderensis Sheard

Data Set Maintenance: Data set authentic and compiled. Data set author(s): Bungartz F. @EXCL@ Sheard J. (02-08-23). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Currently accepted name Rinodina boulderensis Sheard. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Rinodina boulderensis Sheard. Type: Rinodina boulderensis Sheard; protologue: Species corticola vel lignicola. Habitus R. exiguae similis, 'atranorinum' continens, sed amphithecium saepe incompleto, margine tum in parte 'lecideina'. Ascosporae typo Physciarum, 13.4-(16.0-16.8)-19.3, 16.4 x 8.4, 7.1 - (8.2 - 8.6) - 9.7 µm, toris bene evolutis, demum valde pigmentiferis.; type specimen label data: US.A. COLORADO. Boulder Co., Bluebell Canyon, base of Flatirons, near
Boulder, on Acer glabrum, 6000ft, 5 February 1954, W.A. Weber and S.
Shushan S1473. Holotype - COLO, isotype - WIS.

Taxonomic Literature: Bryologist 105: ? (2002).

Biogeography: Northern hemispheric (cool temperate); montane. Continent: Northern America (Rocky Mountain). Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Biotroph; lichenized; lignicolous or corticolous; episubstratic; growing sun-exposed or partially shaded; under conditions which are dry.

Thallus: Crustose, subdivided into main (areoles) parts, areolate (primarily areolate) (areoles 0.35-0.60 mm wide); lobes angular at the front; separate thallus parts.5-1.2-(1.6) mm wide; thin. Thallus Outline: Irregular or orbicular; soon disappearing. Upper Surface: Light grey, matt; not isidate; not sorediate.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or irregular, often becoming adnate (erumpent) to soon sessile, not constricted at the base, abundant, .35-.6-(.7) mm in diam.. Margin: Crenulate, smooth, persistent to excluded (but often poorly developed), 65-120 µm wide; with a thin, inner rim visible between disk and thalline margin (sometimes replacing the thalline margin). Disk: Plane to sometimes weakly convex; black. Exciple: White; inspersed with crystals. Parathecium (proper excipulum): 5-10 µm wide, white. Amphithecium (thalline excipulum): Present; 60-110 µm wide, inspersed with crystals, crystals dissolving in 10% KOH (atranorin crystals); photobiont sparse to abundant. Amphithecial Cortex: Present. Epithecium: Apical cells spathulate, brownish red. Hymenium: 60-110 µm high; white; gelatinized (hyphae often conglutinate). Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: (20)-60-80-(100) µm high; white.

Asci: 50-60 µm long, 14-18 µm wide; dehiscence lecanoralean.

Ascospores: Physcia-type, c. 8 per ascus, spores 8 per ascus, ellipsoid, (13.5)-16-16.4-16.8-(19.5) µm long, (7)-8.2-8.4-8.6-(9.5) 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 (torus) to pale brown, not ornamented.

Conidiomata: Present.

Conidiophores: Vobis-type II. Conidia: Bacilliform; 3.5-5 µm long; 1 µm wide.

Secondary Metabolites: Present; atranorin.

Spot Tests: Present reactions. Upper surface: K + deep yellow, PD – to + yellow (faint); cortex: KC + deep yellow, –, PD – to + yellow (faint); medulla: K – C –, KC –, PD – lower surface: K – soredia: K – KC –.

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

(report generated 13.Nov.2007)