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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
Ocellularia aurata (Tuck.) Hale

Mycotaxon 11: 139 (1980)

Thelotrema auratum Tuck., Proc. Amer. Acad. Arts Sci. 5: 408 (1862); — Ampliotrema auratum (Tuck.) Kalb, in A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 82 (2006).

T: Cuba, C.Wright, Lich. Cub. 133; lecto: FH-TUCK, fide M.E.Hale, Smithsonian Contr. Bot. 38: 41 (1978); isolecto: BM, UPS.

  Thallus endophloeodal to epiphloeodal, to c. 200 µm thick, olive to yellowish or brownish olive, mainly glossy, smooth, ±verrucose, rimose or not. Thallus covered by a discontinuous protocortex or by a true cortex to c. 20 µm thick, consisting of irregular to periclinal hyphae. Algal layer well developed, continuous; calcium oxalate crystals moderately large to large, clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded, apothecioid, solitary to fused, mostly strongly emergent to sessile, subglobose to urceolate. Disc partly visible from above, with a conspicuous yellowish to reddish pruina. Pores formed by the thalline rim margin, large to gaping, to c. 1 mm diam., ±rounded, entire to eroded, then the apex of the proper exciple becoming visible from above as a darkish grey line, moderately thin to moderately thick, concolorous with the thallus to reddish or brownish; thalline rim incurved. Proper exciple fused, thin to thick, carbonised to orange or reddish brown marginally, amyloid at the base. Hymenium to c. 120 µm thick, inspersed, moderately conglutinated; paraphyses straight to slightly bent, parallel to slightly interwoven, unbranched, with unthickened to slightly thickened tips; columellar structures absent. Epihymenium yellowish to reddish, with reddish or brownish granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores mostly submuriform, ellipsoidal, with ±rounded to narrowly rounded ends, hyaline, distinctly amyloid, 10–20 × 8–10 µm, with 4–6 × 1–3 locules; locules ±rounded to ±angular, subglobose to irregular, with hemispherical end cells; transverse septa thick, regular; ascospore wall thick, non-halonate; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish brown, C–, P+ orange-red; containing protocetraric acid (major), virensic acid (minor to trace), confumarprotocetraric acid (trace), fumarprotocetraric acid (trace); ascomata K+ yellow, containing an unknown pigment.
  This pantropical species is rather common on bark in rainforest and mangroves in eastern Qld; found at altitudes from sea level to 530 m.  
  Mangold et al. (2009)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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