Biology:Asterothyrium vezdae
| Asterothyrium vezdae | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Gomphillaceae |
| Genus: | Asterothyrium |
| Species: | A. vezdae
|
| Binomial name | |
| Asterothyrium vezdae Flakus & Lücking (2008)
| |
Asterothyrium vezdae is a species of foliicolous (leaf-dwelling) lichen in the family Gomphillaceae.[1] It is found in Bolivia, where it grows on the leaves of vascular plants in the Amazon rainforest. The lichen is distinguished from its closest relative, Asterothyrium octomerum, by the larger number of septa in its [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and its and black apothecia.
Taxonomy
Asterothyrium vezdae was described as a new species in 2008 by Adam Flakus and Robert Lücking. The type specimen was collected by the first author in Nuevos Reyes village (José Ballivián Province, Beni Department) at an altitude of 190 m (620 ft). The species epithet honours Czech lichenologist Antonín Vězda, "for his numerous and significant contributions to the study of foliicolous lichens world-wide".[2]
Description
The thallus of Asterothyrium vezdae is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (growing on the upper leaf surface), forming rounded to irregular patches that are 1–2 mm in diameter, with a thickness of 20–30 μm. The entire thallus can measure 3–5 mm across and has a smooth, white [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] surface comprising colourless, rectangular cells. Its [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].[2]
The apothecia are typically single on each thallus patch, and [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] in form but with a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] outer margin. They are rounded and measure 0.3–0.6 mm in diameter and 100–180 μm in height. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is plane, with a yellow-brown to dark brown colour, while the margin is thick, strongly prominent, and divided into irregular lobes. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is colourless to pale brown. The hymenium is colorless, while the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is yellow-brown. Asci have an ellipsoid to ovoid shape, while [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are oblong to [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and have from 7 to 15 septa with slight constrictions at the septa. A. vezdae the first species in genus Asterothyrium known to have up to 15-septate spores. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and conical, with a triangular base, while [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are oblong-ellipsoid and lack septa.[2]
Asterothyrium octomerum, found in tropical Africa, has spores similar to A. vezdae, but these spores only contain 7 septa that do not have constrictions. Additionally, A. octomerum has brownish-grey, rather than black apothecia.[2]
Habitat and distribution
At the time of publication, Asterothyrium vezdae was known only from the type locality in the lowland southwest Amazon forest of Bolivia, where it was found growing on the leaves of a vascular plant. The chemical composition of this species has not been tested.[2]
References
- ↑ "Asterothyrium vezdae Flakus & Lücking". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/67W8R.
- ↑ 2.0 2.1 2.2 2.3 2.4 Flakus, Adam; Lücking, Robert (2008). "New species and additional records of foliicolous lichenized fungi from Bolivia". The Lichenologist 40 (5): 423–436. doi:10.1017/s0024282908007378.
Wikidata ☰ Q17387343 entry
 |  |
