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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
Peltula euploca (Ach.) Poelt
  Acta Rer. Nat. Mus. Slov. 13: 8 (1967); Lichen euplocus Ach., Lich. Suec. Prod. Lin. Trib. 14:141 (1798). T: Sweden, Westring; holo: H-ACH.  
  Thallus peltate, sometimes lobed and polyphyllous, anchored by an umbilicus, to 12 mm diam., tan-olive-green to dark olive-brown; margins down-rolled, not undulate, regularly sorediate (laminal soredia occasionally observed). Upper cortex absent; epinecral layer 5–10 µm thick, yellowish to brown. Medulla with a clearly delimited photobiont layer, 70–150 µm thick, the remainder composed of loosely interwoven hyphae with elongate cells 1.5–3 µm thick. Lower cortex 18–90 µm thick, proso- to paraplectenchymatous; hyphae often anticlinally arranged with cells globose to elongate and 3–8 µm thick. Apothecia rare, then many per squamule, immersed; disc punctiform to widely opened, 0.1–0.9 mm diam., reddish, brown or black. Asci clavate to obclavate; ascus wall slightly blue in iodine, blue after pretreatment with KOH. Ascospores 32 to more than 100 per ascus, ellipsoidal to bacilliform, 6–9 × 3–4.8 µm. Pycnidia immersed, to 0.15 mm diam.; conidia fusiform, 3–3.5 × 1–1.5 µm.
  A common species that is known from all States and mainland Territories; grows on acidic rocks (very rarely on calcareous rocks) in deserts and other open, arid and semi-arid habitats and extending into temperate regions. Known from all continents apart from Antarctica.  
  Büdel (2001)  

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

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