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Data Set Maintenance: Data set 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 Data set not to be published after submission.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 endospora Sheard. Rinodina. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Rinodina endospora Sheard. Type: Rinodina endospora Sheard; protologue: Species corticola; sine substantis lichenum. Cortex amphithecii in parte inferiore ad 15-30 µm expansus, cellularis. Asosporae typo Dirinarum, 17.6 - (22.0 - 23.0) - 27.4, 22.5 x 10.8, 9.1 - (10.8 - 11.0) - 12.6 µm, in statu juvenili ad septum dilatatae, in KOH tumescentes. Species in regio 'Californica' dicta endemica.; type specimen label data: U.S.A. California. Santa Clara Co., Mount Hamilton Range, San Antonio
Valley, on barkof Quercus lobata with R. santa-monicae H. Magn., 4th August 1968, Alice Howard s.n. UC - holotype.

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

Ecology: Biotroph; lichenized; corticolous; episubstratic; growing partially shaded; under conditions which are moist.

Thallus: Crustose, subdivided into main (granules or areoles) parts, granular or areolate (primarily areolate), dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts (.15)-.2-.4-(.6) mm wide; thin. Thallus Outline: Indistinct; soon disappearing. Upper Surface: Grey or dark grey-brown, matt; not isidate; not sorediate.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile, strongly constricted at the base, moderately abundant, .4-.7 mm in diam.. Margin: Smooth, persistent, prominent, 70-90-(105) µm wide. Disk: Plane to slightly weakly convex; black. Parathecium (proper excipulum): Broad (expanded above to 20-30 µm), 10-20 µm wide, white. Amphithecium (thalline excipulum): Present; photobiont sparse to abundant. Lower Amphithecium: 60-100 µm high. Amphithecial Cortex: Present (typically with epinecral layer, ca. 5 µm wide); 10-20 µm wide, 15-30 µm wide at the base. Epithecium: Apical cells spathulate, brown. Hymenium: 100-140 µm high; white; gelatinized. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: (30)-50-80 µm high; white.

Ascospores: Dirinaria-type, c. 8 per ascus, spores 8 per ascus, ellipsoid, (17.5)-22-22.5-23-(27.5) µm long, (9)-10.7-10.8-11-(12.5) µm wide; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A) to late during spore ontogeny (Physciaceae-type B); wall apically thickened, subapically thickened, thickened at the septum, becoming pigmented, dark brown (inner part of spore wall (endospore); torus absent) to pale brown, ornamented (lightly).

Conidiophores: Vobis-type VI. Conidia: Bacilliform; 4.5-5.5 µm long; 1 µm wide.

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