Rinodina lignicola Sheard

Data Set Maintenance: Data set authentic. Data set author(s): Sheard J. (02-08-29). Data set not to be published after submission.

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

Type Information: Basionym: Rinodina lignicola Sheard. Type: Rinodina lignicola Sheard; protologue: Species corticola vel lignicola, R. archaeae affinis, 'zeorinum' in quantitate minima continens, sed thallo atrogriseo ad fusco. Apothecia parathecio saepe annulum exipularum fuscum cum disco amphithecioque confluentem formante. Ascosporis typo Physciarum, 16.2 - (19.4 - 20.2) - 23.5, 19.8 x 9.3, 7.9 - (9.2 - 9.5) - 10.7 µm. Distributio in parte occidentali interiore Americae borealis.; type specimen label data: U.S.A. COLORADO. Boulder Co., "Narrows" of Boulder Canyon, 1.5 mi
from Boulder Falls, 7500 ft, on bark at base of Pseudotsuga, 24 June
1954, W.A. Weber S2516. Holotype -COLO.

Taxonomic Literature: Bryologist 105: ? (2002).

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

Ecology: Biotroph; lichenized; lignicolous or corticolous; episubstratic; growing fully shaded; under conditions which are moist.

Thallus: Crustose, not subdivided (rimose thalli) or subdivided into main (areolae or verrucae) parts, rimose (and plane) or areolate (primarily areolate) (and rugose), continuous throughout or dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts (20)-.6-1 mm wide; thin or thick. Thallus Outline: Orbicular; usually indistinct or distinct (on smooth substrates); soon disappearing. Upper Surface: Dark grey or grey-brown, matt; not isidate; not sorediate.

Upper Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, not emerging (initially), becoming adnate or soon sessile (at maturity), not constricted at the base, abundant, .5-.9 mm in diam.. Margin: Smooth, persistent, distinct, 60-100 µm wide; with a thin, inner rim visible between disk and thalline margin. Disk: Plane or weakly convex (or even half-globose); black or dark brown. Exciple: White. Parathecium (proper excipulum): Broad or narrow (expanding 10-40 µm above), 5-20 µm wide, white. Amphithecium (thalline excipulum): Present; 55-80 µm wide; photobiont sparse or abundant. Amphithecial Cortex: Present; 5-10 µm wide, 10-50 µm wide at the base; outer cortical layer white; inner cortical layer white. Epithecium: Apical cells spathulate, brownish red. Hymenium: 70-100 µm high; white; not inspers; iodine reaction: Lugol’s positive. Interascal Hyphae: Distinctly branched, not or scarcely anastomosed. Hypothecium: 40-80 µm high; white; not inspers.

Asci: Clavate; 45-70 µm long, 14-19 µm wide; dehiscence lecanoralean.

Ascospores: Physcia-type (young) or Physconia-type (mature spores), c. 8 per ascus, spores 1 per ascus, ellipsoid, (16)-19.4-19.8-20.2-(23.5) µm long, (8)-9.2-9.3-9.5-(11) µm wide; septa present; transversally septate; 1-transversally septate; forming early during spore ontogeny (Physciaceae-type A); wall apically thickened or apically not thickened (in young spores (Physcia-type)), subapically not thickened, thickened at the septum, becoming pigmented, dark brown (usually with darker torus) or middle brown, ornamented.

Conidiomata: Absent resp. not observed (not seen).

Secondary Metabolites: Present; throughout the thallus medulla, hopane-6a,22-diol, metabolite(s) of unresolved identity: present (4/5/5 trace).

Spot Tests: Absent reactions.

(report generated 13.Nov.2007)