Rinodina californiensis 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 Data set not to be published after submission.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 californiensis Sheard. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Rinodina californiensis Sheard. Type: Rinodina californiensis Sheard ined.; protologue: Species corticola, raro lignicola. Habitus R. capensi similis, sed diminutus. Thallus albidus, cortice 'atranorinum' continente. Cortex amphithecii in parte inferiore haud expansus. Ascosporae typo Dirinarium, 15.3-(18.0 - 18.5) - 21.1, 18.3 x 10.0, 8.4 - (9.9 - 10.1) - 11.6 µm, in statu juvenili ad septum dilatatae, in HOH tumescentes.; type specimen label data: U.S.A. CALIFORNIA. Sonoma Co., about 3 mi E on Spring Mountain road
from Calistoga-Santa Roas road. narrow canyon with Sequoia,
Lithocarpus, Quercus agrifolia. On twigs of Q. agrifolia, 24 November
1962, Isabelle Tavares 1323 with Phyllis Roskin. Holotype, isotypes -
UC.

Taxonomic Literature: Bryologist 105: ? (2002).

Biogeography: Northern hemispheric; mostly coastal. Continent: Northern America. Checklist records: Mexico, Sonoran Desert, and United States and Canada (continental).

Ecology: Biotroph; lichenized; corticolous (less frequently on wood); episubstratic; growing partially shaded; under conditions which are moist.

Thallus: Crustose, not subdivided parts, rimose (becoming); separate thallus parts thin. Thallus Outline: Irregular and orbicular; soon disappearing. Upper Surface: Grey (light to dark), matt, smooth (or minutely rugose); not isidate; not sorediate.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile, slightly constricted at the base, abundant, .3-.7 mm in diam.. Margin: Lecanorine, smooth, persistent, distinct, 55-95 µm wide. Disk: Plane and weakly convex (occasionally becoming); black. Exciple: White; inspersed with crystals (atranorin). Parathecium (proper excipulum): (5)-10-15 µm wide, white. Amphithecium (thalline excipulum): Present; 50-80 µm wide, inspersed with crystals (atranorin); photobiont sparse and abundant. Lower Amphithecium: (35)-60-90 µm high. Amphithecial Cortex: Present; 10-15 µm wide, 10-20-(30) µm wide at the base; outer cortical layer white; inner cortical layer brown. Epithecium: Apical cells spathulate, dark brown or brownish red. Hymenium: 80-100 µm high; usually gelatinized. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 50-80 µm high; white.

Asci: 55-70 µm long, 15-20 µm wide; dehiscence lecanoralean.

Ascospores: Dirinaria-type (mature) or Physcia-type (at first), c. 8 per ascus, spores 8 per ascus, ellipsoid, (15.5)-18-18.3-18.5-(21.5) µm long, (8.5)-9.9-10-10.1-(11.5) 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) or pale brown, ornamented (lightly).

Conidiomata: Present.

Conidiophores: Vobis-type V. Conidia: Bacilliform; 3-4 µm long; 1 µm wide.

Secondary Metabolites: Present; atranorin.

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

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

(report generated 13.Nov.2007)