| Verrucaria oulankaensis | |
|---|---|
Scientific classification
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Eurotiomycetes |
| Order: | Verrucariales |
| Family: | Verrucariaceae |
| Genus: | Verrucaria |
| Species: | V. oulankaensis
|
| Binomial name | |
| Verrucaria oulankaensis Pykälä & Myllys (2017)
| |
Verrucaria oulankaensis is a rare species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found in north-eastern Finland, where it occurs on calcareous rocks on river shores.
The lichen was formally described as a new species in 2017 by Juha Pykälä and Leena Myllys. The type specimen was collected by the first author along the shore of the Oulankajoki river in Oulanka National Park ( Koillismaa); there, at an altitude of 180 m (590 ft), it was found growing on a dolomite rock outcrop jutting out from a southwest-facing rock wall. The species epithet oulankaensis refers to the predominance of collections from the Oulanka area, which the authors call "one of the lichenologically most important areas in Finland". [1] The type specimen is kept in the collections of the mycological herbaria of the Botanical Museum of the Finnish Museum of Natural History. [2]
The colour of the crust-like thallus Verrucaria oulankaensis ranges from pale brown to brownish grey, medium brown or dark brown, and usually grey with a pruinose covering. It has a dark brown prothallus. The perithecia are immersed in the thallus, and measure 0.12–0.27 mm in diameter, and have a dark ostiole (pore) that is often inconspicuous. The exciple (the ring-shaped tissue layer surrounding the hymenium) measures 0.15–0.25 mm and has a dark brown wall. Algal cells are 5–10 μm wide. The asci contain eight spores and measure about 50–61 by 19–24 μm. Ascospores are 16.2–19.3 by 7.7–9.1 μm and lack a perispore (a colorless, often gelatinous enveloping layer). [1]
Verrucaria oulankaensis grows on calcareous rocks, and all collections have been made from rivers shores – a particular habitat that is rare in Finland. The lichen is known to occur only in Oulanka area of northeastern Finland. A common lichen associate in its habitat is Staurothele areolata. Other rare lichens occurring in this area are Nephroma helveticum and Peltigera retifoveata. [1]
- ^ a b c Pykälä, Juha; Launis, Annina; Myllys, Leena (2017). "Verrucaria ahtii, V. oulankaensis and V. vitikainenii, three new species from the Endocarpon group (Verrucariaceae, lichenized Ascomycota)". The Lichenologist. 49 (2): 107–116. doi: 10.1017/s0024282916000694. S2CID 89949641.
- ^ Piirainen, Mikko; Salo, Pertti; Velmala, Saara (2018). "Accessions to the Botanical Museum of the Finnish Museum of Natural History, University of Helsinki, in 2017" (PDF). Memoranda Societas Pro Fauna et Flora Fennica. 94: 109–112.
| Verrucaria oulankaensis | |
|---|---|
|
Scientific classification
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Eurotiomycetes |
| Order: | Verrucariales |
| Family: | Verrucariaceae |
| Genus: | Verrucaria |
| Species: | V. oulankaensis
|
| Binomial name | |
| Verrucaria oulankaensis Pykälä & Myllys (2017)
| |
Verrucaria oulankaensis is a rare species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found in north-eastern Finland, where it occurs on calcareous rocks on river shores.
The lichen was formally described as a new species in 2017 by Juha Pykälä and Leena Myllys. The type specimen was collected by the first author along the shore of the Oulankajoki river in Oulanka National Park ( Koillismaa); there, at an altitude of 180 m (590 ft), it was found growing on a dolomite rock outcrop jutting out from a southwest-facing rock wall. The species epithet oulankaensis refers to the predominance of collections from the Oulanka area, which the authors call "one of the lichenologically most important areas in Finland". [1] The type specimen is kept in the collections of the mycological herbaria of the Botanical Museum of the Finnish Museum of Natural History. [2]
The colour of the crust-like thallus Verrucaria oulankaensis ranges from pale brown to brownish grey, medium brown or dark brown, and usually grey with a pruinose covering. It has a dark brown prothallus. The perithecia are immersed in the thallus, and measure 0.12–0.27 mm in diameter, and have a dark ostiole (pore) that is often inconspicuous. The exciple (the ring-shaped tissue layer surrounding the hymenium) measures 0.15–0.25 mm and has a dark brown wall. Algal cells are 5–10 μm wide. The asci contain eight spores and measure about 50–61 by 19–24 μm. Ascospores are 16.2–19.3 by 7.7–9.1 μm and lack a perispore (a colorless, often gelatinous enveloping layer). [1]
Verrucaria oulankaensis grows on calcareous rocks, and all collections have been made from rivers shores – a particular habitat that is rare in Finland. The lichen is known to occur only in Oulanka area of northeastern Finland. A common lichen associate in its habitat is Staurothele areolata. Other rare lichens occurring in this area are Nephroma helveticum and Peltigera retifoveata. [1]
- ^ a b c Pykälä, Juha; Launis, Annina; Myllys, Leena (2017). "Verrucaria ahtii, V. oulankaensis and V. vitikainenii, three new species from the Endocarpon group (Verrucariaceae, lichenized Ascomycota)". The Lichenologist. 49 (2): 107–116. doi: 10.1017/s0024282916000694. S2CID 89949641.
- ^ Piirainen, Mikko; Salo, Pertti; Velmala, Saara (2018). "Accessions to the Botanical Museum of the Finnish Museum of Natural History, University of Helsinki, in 2017" (PDF). Memoranda Societas Pro Fauna et Flora Fennica. 94: 109–112.