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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
Chapsa phlyctidioides (Müll.Arg.) Mangold

in H.T.Lumbsch, A.Mangold, M.P.Martín & J.A.Elix, Austral. Syst. Bot. 21: 221 (2008)

Ocellularia phlyctidioides Müll.Arg., Hedwigia 32: 130 (1893); — Thelotrema phlyctidioides (Müll.Arg.) Hale, Mycotaxon 11: 132 (1980).

T: Brisbane, Qld, F.M.Bailey 354; holo: G.

  Thallus endophloeodal to epiphloeodal, to c. 150 µm thick, pale grey to greenish grey, dull, smooth to slightly uneven, continuous to verrucose or verruculose, often rimose. True cortex absent; pseudocortex indistinct, discontinuous, to c. 10 µm thick. Algal layer ±continuous, poorly developed; calcium oxalate crystals sparse to abundant, small to large, solitary or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.8 mm diam., ±rounded to slightly irregular, often appearing a little branched or irregular in fused ascomata, apothecioid to indistinctly chroodiscoid, erumpent, solitary or fused, regenerating, immersed to slightly emergent. Disc partly visible from above, pale flesh-coloured, pruinose. Proper exciple not visible from above; thalline rim margin variable, split, ragged or lobed, ±concolorous with the thallus or brighter, incurved to erect when young, becoming layered, splitting and opening irregularly, breaking away in some parts, the remaining portions finally forming the new inner thalline rim, whitish-pruinose, incurved to erect, slightly recurved only in the outer layers. Proper exciple fused, thin to evanescent, hyaline internally to pale yellowish and strongly amyloid marginally. Hymenium to c. 80 µm thick, in post-mature ascomata occasionally with crystal inclusions, moderately conglutinated; paraphyses slightly bent, parallel to interwoven, the tips slightly thickened, somewhat irregular; lateral paraphyses inconspicuous, to c. 20 µm long. Epihymenium hyaline, with yellowish grey granules and crystals. Asci 8-spored; tholus initially thick, not visible at maturity. Ascospores transversely septate, very rarely with a single longitudinal septum, ellipsoidal to fusiform or clavate, the ends ±rounded to subacute, hyaline, non-amyloid to faintly amyloid, 15–24 × 5–7 µm, with 4–8 × 1 (–2) locules; locules ±rounded to slightly angular, subglobose to more often lentiform or acute-lentiform, with hemispherical to conical end cells; septa thin to thick, regular; ascospore wall thick, non-halonate; endospore thick.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), constictic acid (major to minor), hypostictic acid (major to minor), cryptostictic acid (trace), a-acetylhypoconstictic acid (trace).
  Moderately commonon tree bark in rainforest in eastern Qld and north-eastern N.S.W., at altitudes to 800 m; also in the Caribbean, Central America, Sri Lanka and Norfolk Island.  
  Mangold et al. (2009)  

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

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