Australian Biological Resources Study
| Checklist of the Lichens of Australia and its Island Territories | ||
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References | ||
| Pseudoramonia richeae Kantvilas & Vězda | ||
Lichenologist 32: 344 (2000) T: Mt King William, Tas., alt. 1300 m, 13 Jan. 1994, G.Kantvilas 105/84; holo: HO; iso: Herb. Vězda n.v. |
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| Thallus immersed to superficial, to c. 200 µm thick, pale grey to yellowish grey, rarely greenish grey, dull to slightly glossy, smooth, continuous, not or slightly fissured. Thallus with a discontinuous protocortex to c. 25 µm thick, this often becoming distinctly conglutinated near ascomata and forming a true cortex of irregular to periclinal hyphae. Algal layer poorly developed, discontinuous; calcium oxalate crystals absent. Isidia-like structures often present (probably immature ascomata). Ascomata conspicuous, to c. 0.6 mm diam., ±rounded, solitary or fused, often irregular when fused, perithecioid or apothecioid, stipitate, growing successively, either depressed and forming a broad verrucose base or emerging and forming somewhat coralloid structures. Disc usually not visible from above, rarely becoming partly visible, greyish, epruinose. Pores small to moderately broad, to c. 0.4 mm diam., mostly irregular or slightly elongate; margin ±split, incurved and often distinctly sunken, concolorous with the thallus or darkened due to the protuberant proper exciple, otherwise the proper exciple not visible from above. Thalline rim thick, concolorous with the thallus to somewhat darkened, usually depressed-subglobose to irregular, with a ±strongly constricted base; stipe to c. 2 mm long, concolorous with the thallus to reddish brown. Proper exciple fused, thick, pale yellowish to pale yellowish brown internally, brown to carbonised marginally, not separated from the subhymenium, non-amyloid. Hymenium to c. 90 µm thick, not inspersed, strongly conglutinated; paraphyses straight, parallel, with unthickened tips; lateral paraphyses indistinct, to c. 15 µm long; true columella absent, columella-like structures occasionally present in fused ascomata. Subhymenium conspicuous, usually dark brown to carbonised in the upper part, sometimes subtending a lower layer of ±hyaline loosely organised to paraplectenchymatous hyphae resembling a newly developing hymenial layer. Epihymenium hyaline, lacking granules. Asci 8-spored; tholus initially thin, not visible at maturity. Ascospores transversely septate, oblong to somewhat fusiform or clavate, with ±rounded to narrowly rounded ends, hyaline, non-amyloid, 12–26 × 3–6 µm, with 8–12 locules; locules ±rounded to slightly angular, subglobose to oblong or slightly irregular; end cells the same shape, conical or hemispherical; septa thin to thick, slightly irregular; ascospore wall and endospore thin, Pycnidia not seen. CHEMISTRY: Thallus K+ yellowish brown, C–, P+ orange-red; containing succinprotocetraric acid (major), protocetraric acid (major to minor), fumarprotocetraric acid (major to minor). |
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| Occurs on bark and dead leaves of Richea scoparia in subalpine and alpine heathland in Tas., at altitudes of 700–1300 m; endemic. | ||
| Mangold et al. (2009) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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