| Pyxine profallax | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Caliciales |
| Family: | Caliciaceae |
| Genus: | Pyxine |
| Species: | P. profallax |
| Binomial name | |
| Pyxine profallax Kalb (2009) | |
Pyxine profallax is a species of corticolous (bark-dwelling), foliose lichen in the family Caliciaceae. [1] It is found in Australia, Papua New Guinea, and Thailand.
The lichen was formally described as a new species in 2009 by Klaus Kalb. The species epithet refers to its sorediate lookalike, Pyxine fallax . The type specimen was collected in 1975 by Syo Kurokawa near Woitape (Central Province, Papua New Guinea) at an elevation of about 1,600 m (5,200 ft). [2]
The loosely attached grey, whitish, or brownish-grey thallus of Pyxine profallax reaches a diameter of up to 5 cm (2 in). A mat of shiny black rhizines attach the thallus to its bark substrate . The lobes making up the thallus are up to about 1 mm wide, and divide more or less dichotomously . They have pseudocyphellae on the margins and a reticulate upper surface texture. Neither soredia nor isidia occur in this lichen, but it does have ascomata of the obscurens-type, measuring 0.5–1 mm in diameter, with black discs . The ascospores , which number eight per ascus, have a single septum and measure 16–20 by 6.5–8 μm. [2]
Pyxine profallax contains norstictic acid as a major compound, testacein (submajor), and atranorin as a minor secondary metabolite. Thin-layer chromatography shows that it also contains the same chemical array of terpenes that are found in its namesake, P. fallax. [2]
Originally described from Papua New Guinea, it was recorded from Thailand in 2012, [3] and from Queensland, Australia in 2015. [4]
Pyxine is a genus of foliose lichens in the family Caliciaceae. The genus has a widespread distribution in tropical regions.
Aderkomyces thailandicus is a species of corticolous (bark-dwelling), crustose lichen in the family Gomphillaceae. Found in the lower montane rainforests of Thailand, it was described as new to science in 2011.
Pyxine sorediata, commonly known as mustard lichen, is a widely distributed species of foliose lichen in the family Caliciaceae. It has a subtropical to warm temperate distribution, and grows on bark, rocks, and moss as substrates. Pyxine sorediata has been reported from regions of North America, Europe, Africa, Asia, and Australasia.
Pyxine subcinerea is a species of foliose lichen in the family Caliciaceae. It has a pantropical distribution, and typically grows on bark, but less commonly on rocks. The lichen is characterised by its yellow medulla, soralia on the margins on the lobes that make up the thallus, and the presence of the chemical lichexanthone in the cortex.
Pyxine pustulata is a species of corticolous (bark-dwelling), foliose lichen in the family Caliciaceae. Found in Botucatu, Brazil, it was formally described as a new species in 2014 by lichenologists André Aptroot and Patrícia Jungbluth. The type specimen was collected by the authors from the botanical garden on the campus of Botucatu at an altitude of 850 m (2,790 ft).
Polymeridium catapastoides is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. It has a widespread distribution, with occurrences reported in Australia, Malaysia, Thailand, Indonesia, Papua New Guinea, and Brazil. The lichen was formally described as a new species in 2013 by Dutch lichenologist André Aptroot. Resembling Polymeridium catapastum, P. catapastoides can be differentiated by its non-fluorescent thallus under ultraviolet light (UV−). The type specimen was collected in Cape Tribulation, Queensland (Australia), north of Daintree, growing on tree bark.
Astrothelium supraclandestinum is a species of lichen in the family Trypetheliaceae. This lichen species is closely related to Astrothelium subclandestinum, but differs in its hamathecium, which is not inspersed. The species is widespread and has been observed in several countries across different continents.
Astrothelium miniannulare is a species of crustose lichen in the family Trypetheliaceae, characterized by its corticolous (bark-dwelling) habitat and presence of lichexanthone. Characteristics of the lichen include the whitish ring around its ostiole and the presence of three septa in the ascospores.
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Malmidea allobakeri is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
Malmidea allopapillosa is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
Malmidea atlanticoides is a little-known species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil.
Malmidea hechicerae is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
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Malmidea isidiifera is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil and Venezuela.
Malmidea leucopiperis is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil.
Malmidea rhodopisoides is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil.
Malmidea subcinerea is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela. The lichen has a smooth, dull thallus varying in colour from grey to olive, with a white internal medulla. It has sessile, rounded apothecia with light beige to greyish-brown discs.
Malmidea volcaniana is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela. A major characteristic of the species is the coralloid (coral-shaped) clumps of isidia-like outgrowths on the thallus surface.
Astrothelium trematum is a species of corticolous (bark-dwelling), crustose lichen in the family Trypetheliaceae, first described in 2018. Found only in Brazil, it is characterised by its lack of lichexanthone and pigments, and distinctive ascospores.