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Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Chapsa platycarpa (Tuck.) Frisch

in A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 113 (2006)

Thelotrema platycarpum Tuck., Proc. Amer. Acad. Arts Sci. 5: 406 (1862); — Phaeotrema platycarpum (Tuck.) Zahlbr., Cat. Lich. Univ. 2: 609 (1923).

T: Cuba, C.Wright, Lich. Cub. 139; holo: FH-TUCK; iso: BM, US.

Thelotrema platycarpoides Tuck., Proc. Amer. Acad. Arts Sci. 6: 270 (1864); Phaeotrema platycarpoides (Tuck.) Müll.Arg., Flora 69: 311 (1886). T: Cuba, C.Wright, Lich. Cub. 157; lecto: FH-TUCK, fide A.Frisch, K.Kalb & M.Grube, op. cit. 116; isolecto: M, US.

Phaeotrema apertum C.W.Dodge, Beih. Nova Hedwigia 12: 98 (1964). T: Mulange Forest, Uganda, R.A.Dummer 4293; holo: BM.

  Thallus endophloeodal to epiphloeodal, to c. 300 µm thick, dark olive-green to olive-brown or pale yellowish brown, dull to waxy, smooth, continuous to verrucose, non-rimose. True cortex to 50 µm thick, continuous, yellowish, of periclinal or irregular hyphae, occasionally with crystal inclusions. Algal layer continuous and well developed; calcium oxalate crystals abundant, mostly small and scattered, occasionally clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded to slightly irregular, apothecioid to chroodiscoid in older ascomata, erumpent, solitary or fused, often in groups of c. 2–6, immersed. Disc partly to, rarely, completely visible from above, distinctly greyish-pruinose. Proper exciple usually almost completely visible from above, forming an inner margin/pore, slightly split to ridged, free, irregular, broad to gaping, off-white, often ±shrunken, incurved, rarely somewhat erect. Thalline rim margin split and coarsely lobed or eroded, whitish on the inside, concolorous with the thallus, erect to recurved. Proper exciple free, hyaline internally to pale yellowish brown or brownish marginally, non-amyloid. Hymenium to c. 100 µm thick, moderately conglutinated; paraphyses straight to slightly bent, parallel to slightly interwoven, the tips distinctly thickened and somewhat irregular; lateral paraphyses conspicuous, to 20 µm long. Epihymenium hyaline, with greyish to brownish granules and small crystals. Asci 8-spored; tholus initially thin to thick, not visible at maturity. Ascospores transversely septate, ellipsoidal to fusiform, with narrowly rounded to subacute ends, brown, weakly to moderately amyloid, 10–20 × 4–6 µm, with 4–6 (–7) locules; locules ±rounded to angular, ±rounded-lentiform to oblong or irregular; end cells conical; septa thick, regular; ascospore wall thick, non-halonate; endospore thick.
CHEMISTRY: Thallus K+ yellow, C–, P+ orange; containing constictic acid (major), stictic acid (major), a-acetylconstictic acid (trace).
  Rare in northern N.T. and north-eastern Qld; corticolous in lowland rainforest and monsoon forest. Pantropical.  
  Mangold et al. (2009)  

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

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