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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
Lithothelium obtectum (Müll.Arg.) Aptroot

Biblioth. Lichenol. 44: 62 (1991)

Sagedia obtecta Müll.Arg., Linnaea 43: 42 (1880); Arthopyrenia obtecta (Müll.Arg.) Müll.Arg., Flora 66: 318 (1883); Verrucaria tecta Stizenb., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1889–1890: 211 (1891), non Verrucaria obtecta Müll.Arg. (1888).

T: Quille-Niederung, [Zaire], Pechuel-Loesche 300 p.p.; holo: G.

  Thallus brownish to green or grey, corticate. Ascomata solitary or 2–5 joined together with fused ostioles, hemispherical, often distinctly elongate, erumpent from the substratum, superficial or the sides covered by the thallus, 0.3–0.8 mm wide, 0.2–0.4 mm tall; ostiole brown, conical, lateral, 50–120 μm diam. Hamathecium IKI+ blue. Asci 50–70 × 10–12 μm, with a rounded ocular chamber. Ascospores 8 per ascus, irregularly biseriate, colourless, fusiform, with subacute ends, 3-distoseptate, symmetrically septate, 10–18 × 4.0–7.5 μm; lumina rounded; endospore 1–3 μm thick. Pycnidia unknown.
  Occurs on trees in lowland areas of northern N.T. and eastern Qld; also on Christmas Island and Lord Howe Island; often somewhat exposed. Mainly pantropical, it is apparently most common in India.  
  Aptroot (2009c)  

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

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