Biology:Allographa guainiae
| Allographa guainiae | |
|---|---|
Scientific classification 
| |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Allographa |
| Species: | A. guainiae
|
| Binomial name | |
| Allographa guainiae Lücking, N.Marín & B.Moncada (2023)
| |
Allographa guainiae is a species of crustose lichen-forming fungus in the family Graphidaceae.[1] It is a green-gray, bark-dwelling lichen with prominent, straight, slit-like fruiting bodies with distinctively grooved black lips. The species was described in 2023 and is known only from palm-dominated forest in Guainía, Colombia.
Taxonomy
Allographa guainiae was described as a new species in 2023 by Robert Lücking, Norida Lucia Marín-Canchala, and Bibiana Moncada, based on material collected in Colombia (Guainía Department).[2]
Description
The body (thallus) is a crust growing on bark, up to 7 cm across and about 100–150(–200) μm thick. Its surface is coarsely uneven to irregularly warty ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]), green-gray, and dull; no visible border zone ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) is present, though a thin, irregular black line may appear where the thallus meets neighboring lichens. In cross-section, the thallus has a distinct, firm outer skin ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], 15–25 μm), a relatively thick [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (30–70 μm), and a thick inner tissue (medulla, 50–100 μm); crystals are present in both the algal layer and medulla, including clusters of calcium oxalate. The algal partner ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) is from the green algal genus Trentepohlia.[2]
The fruiting bodies are slit-like structures ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) that are straight, unbranched, and prominently raised to sitting directly on the thallus surface ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]), with a thallus-derived rim along the sides (lateral [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]). They are typically 1–3 (sometimes up to 5) mm long and 0.4–0.7 mm wide, with the inner [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] hidden from view. The lips ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) are black and distinctly grooved (striate), with whitish thallus remnants along the grooves; the outer wall ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) is completely blackened ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]). The spore-bearing layer (hymenium) is 130–150 μm high and only very sparsely and finely permeated with oil droplets ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]). The asci are spindle-shaped (fusiform, 120–130 × 12–15 μm), each containing eight ascospores. The ascospores are oblong, divided into 8–10 cells (7–9-septate), 25–30 × 6–7 μm, and stain violet-blue with iodine. Stictic acid was reported as the secondary metabolite.[2]
Habitat and distribution
The species is known to occur only in its type locality in the municipality of Inirida, Guainia Department, Colombia, where it was found at 215 m (705 ft) elevation growing on bark in a palm-dominated forest with abundant chiqui-chiqui palm (Leopoldinia piassaba).[2]
See also
- List of Allographa species
References
- ↑ "Allographa guainiae Lücking, N. Marín & B. Moncada". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/CCJLV.
- ↑ 2.0 2.1 2.2 2.3 Lücking, Robert; Álvaro-Alba, Wilson Ricardo; Moncada, Bibiana; Marín-Canchala, Norida Lucia; Tunjano, Sonia Sua; Cárdenas-López, Dairon (2023). "Lichens from the Colombian Amazon: 666 taxa including 28 new species and 157 new country records document an extraordinary diversity". The Bryologist 126 (2): 242–303. doi:10.1639/0007-2745-126.2.242.
Wikidata ☰ Q138566147 entry
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