Coenogonium zonatum
Synonyms
Biatorinopsis zonata Müll.Arg., Dimerella zonata (Müll.Arg.) R.Sant.
Family
Coenogoniaceae
Flora category
Lichen – Native
Endemic taxon
No
Endemic genus
No
Endemic family
No
Structural class
Lichens - Crustose
Current conservation status
2018 | Data Deficient | Qualifiers: SO
Brief description
Characterised by the foliicolous habit; its relatively large apothecia (0.25–0.5 mm diam.); and the well-developed white prothallus.
Distribution
North Island: Northland (Hen Island). Wellington (Horokiwi Reserve).
Known also from Africa, Mexico, South America and Australia.
Habitat
On Nestegis apetala leaves in mixed forest on Hen Island, in Wellington on leaves of forest trees.
Detailed description
Thallus usually 10–20(–30) mm diam. rarely to 60 mm, smooth, greyish green, usually but shining at margins, 20–25 μm thick. Prothallus thin, well developed, white, 0.1–0.3(–0.5) mm wide. Apothecia strongly constricted at base, 0.25–0.5 mm diam., disc plane, pale reddish yellow, epruinose, margin not prominent, distinct, to 0.05 mm thick, pale-yellow to pale yellow-red, smooth or slightly uneven. Exciple paraplectenchymatous, colourless, 30–70 μm thick in lateral parts, to 70 μm thick basally. Hymenium hyaline, 45–65 μm tall. Paraphyses c. 1 μm diam., apices swollen to 2–4 μm diam. Asci cylindrical, 40–70 × 4–6 μm, 8-spored. Ascospores uniseriate, fusiform, 6–12 × 2.5–4(–4.5) μm. Pycnidia in pale warts, 0.05 mm diam., rare. Conidia 1-septate, bacillar, 12–16 × 2–3 μm.
Substrate
Foliicolous
Attribution
Fact sheet prepared by Marley Ford (23 January 2024). Brief description, Distribution, Habitat, and Features sections copied from Galloway (2007).
References and further reading
Galloway D.J. 2007: Flora of New Zealand: Lichens, including lichen-forming and lichenicolous fungi. 2nd edition. Lincoln, Manaaki Whenua Press. 2261 pp.