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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
Strigula austropunctata P.M.McCarthy

Fl. Australia 57: 661 (2009)

T: Josephine Falls, Wooroonooran Natl Park, 20 km NW of Innisfail, Qld, 17°26’16”S, 145°51’33”E, alt. 80 m, on leaves of trees in lowland, tropical rainforest, 31 July 2006, J.A.Elix 38766; holo: CANB.

  Thallus epiphyllous, supracuticular, readily peeling or flaking from the substratum, 5–12 mm wide, 10–15 µm thick, medium greenish grey, continuous, smooth, minutely punctate; punctae numerous (c. 100 per square millimetre), ±evenly spaced, black, rounded in outline, slightly prominent, 30–50 µm diam.; prothallus rather broad but faint, dark grey, especially distinct where abutting thalli of the same or other species. Photobiont filamentous, the filaments short, sparse, irregular, occasionally aggregated (Phycopeltis?), but not forming radiating plates; cells rounded-angular, narrowly ellipsoidal to oblong, 8–14 × 4–6 µm. Mycobiont a multi-layered reticulum of anastomosing hyphae; cells 2–3 µm wide, with rather thick hyaline, grey or greyish brown walls. Perithecia moderately numerous, almost superficial, prominent, ±hemispherical to subconical, (0.4–) 0.6 (–0.9) mm diam., overgrown almost to the apex by the punctate thallus. Perithecial apex dull black, rounded or with a minute ostiolar papilla to 50 µm wide. Involucrellum carbonaceous, extending to exciple base level and abruptly spreading laterally over the substratum, 20–35 µm thick, with a smooth or ragged outer edge (its full extent clearly visible from above when the thallus is wetted). Exciple pale greyish brown to dark olive-brown, 10–15 µm thick; a loose reticulum of hyaline hyphae occupying the space between the exciple and the lower levels of the spreading involucrellum. Centrum depressed-globose to depressed-ovate, 0.18–0.30 mm diam. Paraphyses simple, 1.0–1.5 µm thick. Asci narrowly obclavate, 68–80 × 8–10 µm. Ascospores elongate-fusiform, less commonly narrowly obclavate, 1-septate, biseriate in the ascus, constricted at the septum, (21–) 26 (–30) × (4–) 5 (–6) µm; cells separating following release from the ascus, occasionally with a pseudoseptum. Conidiomata numerous, hemispherical to subconical, dull black, partly overgrown by the thallus, 0.08–0.15 (–0.20) mm diam.; macroconidia bacilliform to elongate-fusiform, 1-septate, 10–15 × 2.0 (–2.5) µm, most with short blunt gelatinous apical caps; microconidia not seen.
  Known from leaves in lowland and submontane rainforest at two localities in north-eastern Qld.  
  McCarthy (2009b)  

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

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