| Teuvoahtiana | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Teloschistales |
| Family: | Teloschistaceae |
| Genus: | Teuvoahtiana S.Y.Kondr. & Hur (2017) |
| Type species | |
| Teuvoahtiana rugulosa (Nyl.) S.Y.Kondr. & Hur (2017) | |
Teuvoahtiana is a genus of lichen-forming fungi in the family Teloschistaceae. [1] [2] It contains three species of saxicolous (rock-dwelling), crustose lichens, all of which occur in South America.
Teuvoahtiana was circumscribed in 2017 by lichenologists Sergey Kondratyuk and Jae-Seoun Hur, with Teuvoahtiana rugulosa assigned as the type species. [3] This species was first formally described as Placodium rugolosum by William Nylander in 1855. [4] The genus name honours Finnish lichenologist Teuvo Ahti, "in recognition of his contribution to lichenology and especially to development of lichenological investigation in the South American continent". [3]
Teuvoahtiana has members that are crustose, areolate , and squamulose –an unusually diverse range of forms for a single monophyletic branch of the Teloschistaceae. In some cases, the peripheral zone of the thallus has unique areoles that are elongated to form distinct lobes . This genus is noted for the pronounced thickness of the areolae and lobes. Their colour ranges from a luminescent yellow-orange to a more muted yellowish-brown or dull orange-brown. When numerous apothecia are present, the thallus can take on a less common reddish-orange-brown shade. Structurally, the cortical layer transitions between a paraplectenchymatous to a mesodermatous paraplectenchymatous state. [3]
The apothecia of Teuvoahtiana vary from medium to large size, often congregating in dense clusters. They have a lecanorine to zeorine structure, with a flat disc that displays a spectrum of colours from soft yellow to a more vibrant pinkish orange-brown. The true exciple , or outer layer, is characterised by a complex interwoven structure, known as " textura intricata ". The asci, the reproductive sacs in which spores are formed, hold a variable count of one to eight spores. These ascospores are polarilocular (divided into two compartments by a thick septum with a perforation). [3]
Teuvoahtiana is similar to the Australian genus Filsoniana , but unlike that genus, is in the subfamily Xanthorioideae rather than subfamily Teloschistoideae. Close relatives of Teuvoahtiana include the genera Xanthopeltis and Austroplaca . [3]
The new species Teuvoahtiana meridionalis was recently (2023) described from Antarctica and Southern South America. [5]
Igneoplaca is a genus in the subfamily Xanthorioideae of the family Teloschistaceae. It contains a single species, the crustose lichen Igneoplaca ignea.
Huneckia is a genus of crustose lichens in the subfamily Caloplacoideae of the family Teloschistaceae. It has four species.
Tomnashia is a genus of lichen-forming fungi in the family Teloschistaceae. It has four species of saxicolous (rock-dwelling), crustose lichens that occur in southwestern North America.
Tassiloa is a genus of lichen-forming fungi in the family Teloschistaceae. It has two species.
Elixjohnia is a genus of lichen-forming fungi in the family Teloschistaceae. It has four species of saxicolous (rock-dwelling), crustose lichens that occur in Australasia.
Rusavskia is a genus of lichen-forming fungi in the family Teloschistaceae. It has 12 species. It is a member of the subfamily Xanthorioideae. The thallus of Rusavskia is characterized by its foliose (leaf-like) structure with distinct and typically narrow lobes that curve outwards.
Zeroviella is a genus of lichen-forming fungi in the subfamily Xanthorioideae of the family Teloschistaceae. It has eight saxicolous (rock-dwelling) species. Zeroviella was segregated from Rusavskia, a closely related genus, in 2015.
Opeltia is a genus of lichen-forming fungi in the family Teloschistaceae. It has four species of corticolous (bark-dwelling), crustose lichens.
Erichansenia is a genus of lichen-forming fungi in the family Teloschistaceae. It has three species of saxicolous (rock-dwelling), crustose lichens.
Fauriea is a genus of lichen-forming fungi in the family Teloschistaceae. The genus, which contains seven species, is a member of the subfamily Caloplacoideae.
Marchantiana is a genus of lichen-forming fungi in the family Teloschistaceae. It contains seven species of corticolous (bark-dwelling), crustose lichens that occur in the Southern Hemisphere.
Eilifdahlia is a genus of lichen-forming fungi in the family Teloschistaceae. It contains three species of corticolous (bark-dwelling), crustose lichens that occur in the Southern Hemisphere.
Hosseusiella is a genus of lichen-forming fungi in the family Teloschistaceae. It has three species of crustose to foliose (leafy) lichens, some of which grow on bark, while others grow on rock. All three occur in the southern part of the South American continent, where they are fairly common.
Pisutiella is a genus of lichen-forming fungi in the family Teloschistaceae. It contains five species of saxicolous (rock-dwelling), crustose lichens that are found in a variety of environments in the Northern Hemisphere.
Xanthaptychia is a genus of lichen-forming fungi in the family Teloschistaceae. The genus, circumscribed in 2017, has three corticolous (bark-dwelling) species.
Franwilsia is a genus of lichen-forming fungi in the family Teloschistaceae. It has three species.
Upretia is a genus of lichen-forming fungi in the family Teloschistaceae. It has three species of saxicolous (rock-dwelling), crustose lichens. Upretia is characterised by its small ascospores and narrow, rod-shaped conidia. The distribution of the genus ranges from mid-altitude rocky terrains in India to both arid and higher altitudinal environments in China.
Elixjohnia gallowayi is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It has a vividly coloured thallus, ranging in hues from bright red to reddish-orange. It is found in Australia.
Gintarasiella is a single-species genus in the fungal family Teloschistaceae. It contains the species Gintarasiella aggregata, a saxicolous (rock-dwelling), crustose lichen that is found in Australia. The lichen forms uneven, pillow-like patches up to 30 mm across, distinguished by its yellow-orange areoles that are tightly packed or spread out and soon covered by many apothecia. These fruiting bodies start as zeorine in form and later become biatorine, ranging from 0.3 to 1 mm wide and often appearing distorted due to their dense clustering.
Oxneriopsis is a genus of lichen-forming fungi in the family Teloschistaceae. It has four species of corticolous (bark-dwelling), crustose lichens.