Biology:Fissurina karnatakensis
| Fissurina karnatakensis | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Fissurina |
| Species: | F. karnatakensis
|
| Binomial name | |
| Fissurina karnatakensis Makhija & Adaw. (2007)
| |
Fissurina karnatakensis is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae.[1] Found in India, it was formally described as a new species in 2007 by Urmila Makhija and Bharati Adawadkar. It grows on tree trunks in exposed conditions along roadsides within moist forests, particularly in Karnataka, a state known for its many endemic lichen species.[2]
Description
The thallus of Fissurina karnatakensis is brown and slightly glossy, with a smooth to uneven texture with cracks. The periphery of the thallus is delimited by a thin, black [[Glossary of lichen terms#{{biology:{1}}}|hypothalloidal]] region. The ascomata, or fruiting bodies, are [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] in form and immersed, matching the colour of the thallus. They can be simple or branched, measuring 1–6 mm in length and 0.25 mm in width. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is not visible and very narrow, with a slit-like appearance. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is often separated by a narrow slit from the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].[2]
The exciple is non-striate and present at the base, with a pale orange-brown colour. It is non-[[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and covered by a distinct [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] layer. The hymenium, a layer containing the asci, is 105–113 μm high. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are approximately 1 μm thick, with hyaline, distinctly warty tips. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are short to moderately long and distinctly warty. The asci are 8-spored, and the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], which measure 14–21 by 3–5 μm with a 1–1.6 μm-thick [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], contain 3 transverse septa.[2]
Chemical spot tests reveal that Fissurina karnatakensis has K+ (yellow), C−, KC−, P+ (rust-red), and UV− reactions. It contains protocetraric and fumarprotocetraric acids, which lichen products that are rare in the family Graphidaceae. Fissurina karnatakensis features the "comparilis-type" ascomatal structure and is distinct from other species like Fissurina verrucosa due to its exciple, which often has 2 striae (grooves), smaller ascospores (7–12 μm long), and a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] thallus.[2]
References
- ↑ "Fissurina karnatakensis Makhija & Adaw.". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/6J5RS.
- ↑ 2.0 2.1 2.2 2.3 Makhija, Urmila; Adawadkar, Bharati (2007). "Trans-septate species of Acanthothecis and Fissurina from India". The Lichenologist 39 (2): 165–185. doi:10.1017/s0024282907004756.
Wikidata ☰ Q17387799 entry
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