Biology:Allographa pedunculata
| Allographa pedunculata | |
|---|---|
Scientific classification 
| |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Allographa |
| Species: | A. pedunculata
|
| Binomial name | |
| Allographa pedunculata (Bungartz & Aptroot) Lücking & Kalb (2018)
| |
| Synonyms[1] | |
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Allographa pedunculata is a species of script lichen in the family Graphidaceae,[2] discovered in the Galápagos Islands. The species is characterized by its distinctly stalked [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and contains norstictic acid. It is similar to other species in the Graphis nuda species complex but has the longest [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] in the group.
Taxonomy
The lichen was first formally described by lichenologists Frank Bungartz and André Aptroot in 2010, as a member of the genus Graphis. The species is part of the Graphis nuda group and is closely related to Graphis emersa, another species containing norstictic acid.[3] Robert Lücking and Klaus Kalb transferred the taxon to the genus Allographa in 2018.[4]
Description
The thallus of Allographa pedunculata is thin and continuous, either forming a thin film encrusting bryophytes and plant debris, or granular to granular [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], over rock. The thallus surface is smooth and shiny, pale creamy white to brownish, and not [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Its apothecia are typically distinctly and conspicuously stalked, rarely [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. The lirellae are very broad and short, and never branched. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are thick, entire, and black, only basally more or less covered by a thin thallus layer. The hymenium is hyaline and clear. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are hyaline to pale gray, brownish with age, and measure 22–27 by (80)130–210 μm; they are transversely septate with (11)16–22 cells.[3]
The lichen contains norstictic acid, which causes a K+ (yellow turning red) (red crystals) and P+ (yellow) spot test reactions. It is C−.[3]
Habitat and distribution
Allographa pedunculata is currently known from a single collection site on a sheltered and shaded basalt cliff at the top of Cerro Gavilán in Santiago Island. The species prefers rock substrates and is found in a distinct habitat compared to its close relative, Graphis cleistomma, which has been found encrusting bryophytes and plant debris.[3]
References
- ↑ "Synonymy. Current Name: Allographa pedunculata (Bungartz & Aptroot) Lücking & Kalb, Herzogia 31(1, Teil 2): 554 (2018)". Species Fungorum. https://www.speciesfungorum.org/Names/SynSpecies.asp?RecordID=554678.
- ↑ "Allographa pedunculata (Bungartz & Aptroot) Lücking & Kalb". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/BWVC.
- ↑ 3.0 3.1 3.2 3.3 Bungartz, Frank; Lücking, Robert; Aptroot, André (2010). "The family Graphidaceae (Ostropales, Lecanoromycetes) in the Galapagos Islands". Nova Hedwigia 90 (1–2): 1–44. doi:10.1127/0029-5035/2010/0090-0001.
- ↑ 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. doi:10.13158/heia.31.1.2018.535.
Wikidata ☰ Q107479218 entry
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