Biology:Malmidea eeuuae
| Malmidea eeuuae | |
|---|---|
Scientific classification 
| |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Malmideaceae |
| Genus: | Malmidea |
| Species: | M. eeuuae
|
| Binomial name | |
| Malmidea eeuuae Kalb (2011)
| |
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| Holotype: Khao Yai National Park, Nakhon Ratchasima province, Thailand | |
Malmidea eeuuae is a corticolous (bark-dwelling), crustose lichen in the family Malmideaceae.[1] It was described in 2011 from Khao Yai National Park in north-eastern Thailand. The species has a finely warted thallus and non-septate, halonate ascospores, and it differs from M. coralliformis by its larger spores.
Taxonomy
The species was introduced as Malmidea eeuuae by Klaus Kalb in 2011 within a study on Malmidea and the family Malmideaceae. The holotype was collected in a very disturbed tropical rainforest near the students' lodges (Ban Krong Kaew) in Khao Yai National Park, Nakhon Ratchasima province, at about 760 m elevation. The specific name honours Jutarat Sutjaritturakan ("Eeuu"), a Thai lichenologist.[2]
Description
The thallus is thin, crust-like and continuous (about 150–200 μm thick) on bark, densely warted ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) with warts 0.1–0.15 mm high and 0.1–0.25 mm wide; soredia and isidia are absent. The medulla is cream-coloured and reacts potassium hydroxide (KOH)-positive (dark orange to orange-red). The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (cells 5–8 μm in diameter). Apothecia are [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], rounded to slightly [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], 0.2–0.5 mm across and 0.1–0.2 mm high; the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is plane to slightly convex and light leather-brown to tawny, with a thin [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] margin of the granifera type that starts entire and prominent but becomes slightly recurved and warty; the margin is 80–130 μm thick and whitish to cream. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is hyaline at the periphery and internally shows a medullary layer of loosely arranged, periclinal hyphae with constricted septa, 30–50 μm wide, bearing yellowish to ochraceous-yellow hydrophobic granules that partly dissolve in KOH with a yellowish to greenish-yellow reaction. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is about 50 μm high and chocolate- to olive-brown; the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is 50–75 μm high, brown and K–; the hymenium is 100–120 μm high and hyaline. Asci measure 55–70 × 16–20 μm. Ascospores number 4–6 (more rarely up to 8) per ascus, are colourless, ellipsoid, non-septate and [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], typically 16–20 × 8–11 μm with a 1–1.5 μm [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Reported chemistry includes xantholepinone G (major), contortin (submajor), concontortin (minor) and three unknown xantholepinones (minor). [2]
Habitat and distribution
Known from Khao Yai National Park, Malmidea eeuuae grows on tree bark in very disturbed tropical rainforest around 760 m elevation, near the students' lodges at Ban Krong Kaew.[2]
References
- ↑ "Malmidea eeuuae Kalb". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/3XQ89.
- ↑ 2.0 2.1 2.2 Kalb, Klaus; Rivas Plata, Eimy; Lücking, Robert; Lumbsch, H. Thorsten (2011). "The phylogenetic position of Malmidea, a new genus for the Lecidea piperis- and Lecanora granifera-groups (Lecanorales, Malmideaceae), inferred from nuclear and mitochondrial ribosomal DNA sequences, with special reference to Thai species". A Lichenological Legacy – Festschrift Thomas H. Nash III. Bibliotheca Lichenologica. 106. Stuttgart: J. Cramer in der Gebråder Borntraeger Verlagsbuchhandlung. pp. 143–168. ISBN 978-3-443-58085-8. https://www.researchgate.net/publication/284543336.
Wikidata ☰ Q21326284 entry
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