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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
Verrucaria cootapatambensis P.M.McCarthy
  Lichenologist 34: 207 (2002). T: tributary of Swampy Plain R., 150 m E of L. Cootapatamba, Mount Kosciuszko National Park, New South Wales, 36°28.1'S, 148°16.0'E, alt. 2060 m, on small sandstone boulder in snow-melt creek, 14 January 2002, P.M.McCarthy 1801; holo: CANB.  
  Thallus crustose, epilithic, effuse to determinate, to 3 cm wide, dull greenish or greyish black, ±smooth, sparingly to richly and delicately rimose, not areolate except around some perithecia, 20–40(–50) µm thick, becoming greener, gelatinous and ±continuous when wetted. Cortex apparently lacking or consisting of dark, globose, thick-walled cells 3–5(–7) µm diam.; these sometimes also clustered within the thallus. Algae irregularly massed, green to greenish orange, vertically oriented and broadly ellipsoid or globose, 5–9(–11) × 4–8 µm. Mycobiont cells hyphal and 2–3 µm wide or paraplectenchymatous and 4–5 × 2–3 µm. Prothallus not apparent; black basal layer absent. Perithecia numerous, semi-immersed to almost superficial, convex, hemispherical, subconical or subglobose, usually with a 10–15 µm thick covering of thallus over the lower half. Perithecial apex rounded, truncate or subacute. Ostiole inconspicuous or in a shallow, c. 20 µm diam. depression. Involucrellum dull black and minutely uneven in surface view, olive-black in thin section, extending down to excipulum-base level, arching slightly away from the excipulum or ±contiguous with it, (0.19–)0.26(–0.33) mm diam. [n = 60], dense and 30–60 µm thick near the apex, more diffuse and 40–80 µm thick at the base; space between involucrellum and excipulum often containing rock crystals. Centrum globose to depressed-ovate, 0.12–0.18 mm diam. Excipulum dark greenish brown near the apex, at the sides and base with a hyaline inner layer and a pale to medium greenish brown outer layer, 15–20 µm thick. Periphyses 15–20 × 1.5–2 µm, simple to sparingly branched; apices neither rounded nor pointed. Paraphyses absent. Hymenial gel Lugol's I+ red-brown. Asci 8-spored, clavate to cylindroclavate, 42–52(–60) × 14–20 µm. Ascospores simple, hyaline, ellipsoid, obovate or subglobose, massed or irregularly biseriate in the ascus, (8.5–)11(–14) × (6–)7.5(–9.5) µm [n = 100]; contents usually finely granulose and frequently guttulate. Conidiomata not seen.
  Known only from the type locality in alpine N.S.W.  
  McCarthy (2002)  

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

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