Biology:Fissurina khasiana
| Fissurina khasiana | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Fissurina |
| Species: | F. khasiana
|
| Binomial name | |
| Fissurina khasiana Makhija & Adaw. (2007)
| |
Fissurina khasiana is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae.[1] It is found in India, specifically in the evergreen forests of Upper Shillong in the Khasi Hills; its species name is derived from the region where it was first collected. The lichen was formally described as a new species in 2007 by Urmila Makhija and Bharati Adawadkar.[2]
Description
The thallus of Fissurina khasiana is greyish-green in colour, with a smooth and cracked surface that appears [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Its ascomata, or fruiting bodies, are [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] in form and measure 2–4 mm in length and 0.1 mm in width. They can be simple or irregularly branched, immersed, and end in a sharp or somewhat acute tip. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] of the ascomata is narrow, black, and indistinct. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is present at the base, non-striate, and non-[[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], with a round and somewhat puffed appearance. It is mostly convergent to slightly divergent and covered by a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] up to the top.[2]
The hymenium is hyaline, not [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and ranges from 80 to 100 μm in height. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is also hyaline. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are simple, long, and thin, with slightly elongate, warty tips. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are short and mostly smooth, occasionally having warty tips. Asci are cylindrical, 6–8-spored, and measure 50–60 by 6–8 μm. The ascospores are ellipsoidal with 3 transverse septa, and measure 16–19 by 8–10 μm and a 1.6–2 μm-thick [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].[2]
Chemical spot tests reveal that the thallus of Fissurina khasiana has K+ (yellow-red), C−, KC−, P+ (orange), and UV− reactions. The lichen contains both constictic and stictic acids. The ascomatal structure of the species is considered to be of the "comparilis-type." However, Fissurina khasiana is distinct from other species in this group due to the presence of both stictic and constictic acids in its thallus.[2]
Fissurina khasiana has an ascomatal structure that is intermediate between Fissurina inquinata and F. triticea. It is distinguished by its relatively minor "puffing" and a non-carbonized exciple, setting it apart from both F. inquinata, which has little "puffing" and a carbonized exciple, and F. triticea, which has strongly "puffed" ascomata and a non-carbonized exciple. Additionally, Fissurina triticea has larger and more rounded ascospores, measuring 15–20 by 10–15 μm.[2]
References
- ↑ "Fissurina khasiana Makhija & Adaw.". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/6J644.
- ↑ 2.0 2.1 2.2 2.3 2.4 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 ☰ Q17387864 entry
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