Rinodina caesiocinerea Sheard

Data Set Maintenance: Data set compiled. Data set author(s): Bungartz F. (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 Data set not to be published after submission.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 caesiocinerea Sheard. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Rinodina caesiocinerea Sheard. Type: Rinodina caesiocinerea Sheard; protologue: Species saxicola; R. oxydatae similis; cortex 'atranorinum' continens, plerumpque etiam pigmento caesiocinereo, tandem carbonaceum. Epihymenium partim etiam pigmento caesiocineraeo. Ascosporae typo Mischoblastiarum, 21.6 - (25.2 - 26.6) - 30.2, 25.9 x 14.1, 11.9 (13.7 - 14.4) - 16.2 µm. Solum in petris litoralibus in regione Pacifica boreo-occidentali.; type specimen label data: Canada. British Columbia. Galiano Island, Whaler Bay, 48.54N 123.20W, on sandstone beach, 30 MAy 1974, W.J. Noble 938 (Holotype, isotype - UBC).

Taxonomic Literature: Bryologist 105: ? (2002).

Biogeography: Northern hemispheric; coastal. Continent: Northern America (Pacific Northwest endemic). Checklist records: United States and Canada (continental).

Ecology: Biotroph; lichenized; episubstratic; growing sun-exposed; under conditions which are dry or moist; substrate non-calciferous.

Thallus: Crustose, subdivided into main or not subdivided (areoles) parts, areolate (primarily areolate); lobes angular at the front; plane, subconvex, or convex; separate thallus parts.6-.8 mm wide; thick (in the center). Thallus Outline: Irregular or orbicular; distinct; soon disappearing. Upper Surface: Grey (light to dark) or grey-brown, matt; not isidate; not sorediate.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or irregular, soon sessile, slightly constricted at the base, abundant, up to.6 mm in diam.. Margin: Lecanorine, smooth, persistent, distinct, 55-90 µm wide; without a thin rim between disk and thalline margin. Disk: Plane; black. Exciple: Aeruginose (aeruginose); inspersed with crystals. Parathecium (proper excipulum): Broad (expanding to ca 20 µm above), 5-10 µm wide, aeruginose. Amphithecium (thalline excipulum): Present; 50-80 µm wide, inspersed with crystals. Amphithecial Cortex: Present; 10-20 µm wide. Epithecium: Apical cells spathulate, dark brown or brownish blue (aeruginose). Hymenium: 80-100 µm high; white. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 40-60 µm high; white.

Asci: 70-90 µm long, 25-32 µm wide; dehiscence lecanoralean.

Ascospores: Mischoblastia, c. 8 per ascus, spores 8 per ascus, ellipsoid, (21.6)-25.2-25.9-26.6-(30.2) µm long, (11.9)-14.7-14.1-14.4-(16.2) µm wide; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A); wall apically thickened, subapically thickened, thickened at the septum, becoming pigmented, pale brown, not ornamented.

Conidiomata: Present.

Conidiophores: Vobis-type I. Conidia: Bacilliform; 2.5-3.5 µm long; 1 µm wide.

Secondary Metabolites: Present; only in the upper part of the cortex, atranorin.

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

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

(report generated 13.Nov.2007)