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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
Topeliopsis pseudoexanthismocarpa (Patw. & C.Kulk.) Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 659 (2009)

Ocellularia pseudoexanthismocarpa Patw. & C.Kulk., Norweg. J. Bot. 24: 130 (1977); — Thelotrema pseudoexanthismocarpum (Patw. & C.Kulk.) Hale, Mycotaxon 11: 132 (1980).

T: Anamalai Hills, Kerala, India, Nagarkar & Gole 76308; holo: AMH n.v.; iso: US.

  Thallus endophloeodal to epiphloeodal, to c. 500 µm thick, pale yellowish to greenish brown or pale olive, waxy, smooth, continuous to verrucose, non-rimose to sparingly rimose. True cortex to c. 50 µm thick, yellowish, consisting of periclinal or irregular hyphae. Algal layer continuous but poorly developed; calcium oxalate crystals abundant, of variable size, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.8 mm diam., ±rounded to somewhat irregular, perithecioid or apothecioid, erumpent, solitary to marginally fused, immersed to distinctly emergent, then subglobose to urceolate. Disc not visible from above. Pores minute to small, to c. 0.2 (–0.4) mm diam., ±rounded to slightly irregular; pore margin entire to slightly split, incurved; proper exciple not visible from above [the inner thalline rim layer (see below) can be confused with the proper exciple]. Thalline rim coarsely cracked and initially rather thin, becoming thick, distinctly lacerate, slightly layered, ±exfoliating, off-white or brighter, then coarsely cracked, erect to recurved, concolorous with the thallus. Proper exciple fused to rarely apically exposed, thick, hyaline to pale yellowish internally, yellowish brown to reddish brown marginally, non-amyloid. Hymenium to c. 200 µm thick, conglutinated; paraphyses slightly bent, parallel to slightly interwoven, with unthickened to moderately thickened tips; lateral paraphyses conspicuous, to c. 20 µm long. Epihymenium hyaline, lacking granules. Asci 4–8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, bacilliform-fusiform, ±bent, with narrowly rounded to subacute ends, hyaline, strongly amyloid, 100–200 × 10–20 µm, with 12–30 locules; locules initially angular, becoming ±rounded, subglobose or more commonly lentiform or oblong, with hemispherical to conical end cells; septa moderately thin, regular to slightly irregular; ascospore wall thick, usually with a ±distinctly crenate to slightly irregular surface, with a thin halo (especially in younger stages)..
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Rare in rainforest in north-eastern Qld; also in India and Sri Lanka.  
  Mangold et al. (2009)  

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

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