Biology:Hemithecium staigerae
| Hemithecium staigerae | |
|---|---|
Scientific classification 
| |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Hemithecium |
| Species: | H. staigerae
|
| Binomial name | |
| Hemithecium staigerae Adaw. & Makhija (2005)
| |
Hemithecium staigerae is a species of crustose lichen-forming fungus in the family Graphidaceae,[1] described from India in 2005 by Bharati Adawadkar and Urmila Makhija. The species was named in honour of the lichenologist Bettina Staiger, and its holotype was collected in Tamil Nadu (Kodaikanal, Silver Cascade) in January 1975.[2] Robert Lücking and Klaus Kalb later opined that the lichen was "likely a species of Diorygma".[3]
Hemithecium staigerae has a thick, cracked thallus that is white with a greenish tinge and has a thin black [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are delicate, the same colour as the thallus, about 0.5–3 mm long, [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] to branched, scattered, and immersed in the thallus, with acute to rounded ends. Ascospores are fusiform to ellipsoidal, 5–7-trans-septate, and measure 21–29 × 4–5 μm.[2]
In spot tests the thallus is K+ (yellow) and P+ (orange), and the lichen products reported include testacein A, testacein B, and consalazinic acid. The original description states that it is not readily comparable with other known Hemithecium species, separating it by its greenish white, [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (mealy) thallus, short immersed lirellae, an [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] that is entire to sometimes internally grooved ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]), and its secondary chemistry. Collections cited in the protologue are from tropical montane forest in Tamil Nadu (Kodaikanal area).[2]
References
- ↑ "Hemithecium staigerae Adaw. & Makhija". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/3KTFL.
- ↑ 2.0 2.1 2.2 Adawadkar, B.; Makhija, U. (2005). "Some trans-septate species of the genera Hemithecium and Platythecium from India". Mycotaxon 92: 387–394. doi:10.5962/p.414641.
- ↑ Lücking, R.; Kalb, K. (2018). "Formal instatement of Allographa (Graphidaceae): how to deal with a hyperdiverse genus complex with cryptic differentiation and paucity of molecular data.". Herzogia 31 (p1): 535–561 [558]. doi:10.13158/heia.31.1.2018.535.
Wikidata ☰ Q107736483 entry
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