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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
Thelidium pluvium Orange
  Lichenologist 23: 101 (1991). T: Ellerside, New Barrow, near Newby Bridge, Westmorland, England, 19 Feb. 1988, A.Orange 6647; holo: NMW; iso: H, both n.v.  
  Thallus epilithic, continuous to sparingly rimose, smooth, pale to medium greenish brown. Algae broadly ellipsoidal to subglobose, 5–12 × 4–10 µm. Prothallus not apparent. Perithecia hemispherical to superficial, but partly or almost completely overgrown by the thallus,
0.29–0.41 mm diam.; ostiole inconspicuous. Involucrellum dimidiate, brown-black. Exciple 20–25 µm thick, dark brown near the apex, hyaline towards the base. Centrum 0.2–0.28 mm wide. Periphyses c. 40 µm long. Asci 75–100 × 25–30 µm. Ascospores ellipsoidal, 1-septate, 21–31 × 12–16 µm.
  Known from a subalpine creek in northern Tas. where it grows on shaded semi-aquatic limestone; also in the British Isles and Norway.  
  McCarthy (2001g)  

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

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