Biology:Phaeographis striata
| Phaeographis striata | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Phaeographis |
| Species: | P. striata
|
| Binomial name | |
| Phaeographis striata Bungartz (2010)
| |
Phaeographis striata is a species of script lichen in the family Graphidaceae,[1] endemic to the Galápagos Islands. It is characterized by its inconspicuous thallus and striate (grooved) [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] of the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. The species is found in the lower transition zone, growing on columnar cacti and other plants native to the region.
Taxonomy
Phaeographis striata was first described by Frank Bungartz in 2007, who designated a holotype collected from San Cristóbal Island, Cerro Partido in the Galápagos Islands. The species is similar to Fissurina columbina but has apical carbonized [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and brown [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. The name Phaeographis striata refers to the striate (furrowed) thalline margins of the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].[2]
Description
The thallus of Phaeographis striata is thin, inconspicuous, and almost entirely embedded in the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Its surface is smooth, not [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and of the same color as the substrate or slightly darker and more yellowish-orange. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are immersed, lirellate, and initially [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], with thin, elongate, and moderately to sparsely branched lirellae. The labia are thin and narrow, surrounded by a striate thalline margin composed of several papery thallus layers. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is initially fissurine but soon expands, becoming immersed, flattened, blackened, and covered by [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] whitish pruina. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is thin, with apical [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and an aeruginose pigment that fades laterally and is unpigmented basally. The hymenium is translucent, with pale gray ascospores that soon turn brown, measuring 17–23 by 7–9 μm and usually containing 4–6 cells.[2]
Habitat and distribution
Phaeographis striata is currently known only from the Galápagos Islands, specifically from the Alcedo Volcano on Isabela Island and San Cristóbal Island. It is considered endemic to the region and grows in the lower transition zone (an ecological region where vegetation and habitats transition between the arid lowlands and the humid highlands), on the columnar cactus Jasminocereus thouarsii and the tree Bursera graveolens.[2]
References
- ↑ "Phaeographis striata Bungartz". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/76W4T.
- ↑ 2.0 2.1 2.2 Bungartz, Frank; Lücking, Robert; Aptroot, André (2010). "The family Graphidaceae (Ostropales, Lecanoromycetes) in the Galapagos Islands". Nova Hedwigia 90 (1–2): 1–44.
Wikidata ☰ Q108172052 entry
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