Sanja Savić

Atla is a genus of crustose lichens in the family Verrucariaceae. It has nine species that grow on rocks or on soil.

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Atla wheldonii is a species of terricolous (ground-dwelling), crustose lichen in the family Verrucariaceae. Found in Europe, it was formally described as a new species in 1947 by William Gladstone Travis from specimens collected from sand dunes in Lancashire, England, in 1924. Sanja Savić and Leif Tibell transferred the taxon to genus Atla in 2008 following molecular phylogenetic analysis that showed that it, along with three other Northern European species, comprised a distinct clade in the Verrucariacae. In additional to the British Isles, Atla wheldonii has also been recorded in the

Atla praetermissa is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It forms a very thin, mesh-like thallus that varies in colour from grey to dark green, sometimes with a brownish tint. The species is characterised by small, spherical reproductive structures and hyaline spores with a distinctive internal wall structure. First described in 2008, this lichen grows specifically on calcareous rocks near streams and in waterfall spray zones at elevations between 165 and 955 metres. Although known only from Scandinavia (Sweden and Norway), experts suggest it

Atla palicei is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. It forms a thin, blackish-brown to black growth with a scurfy appearance and a diffusely areolate pattern on its substrate. The lichen contains a complex mixture of photobionts, including an unidentified green alga and cyanobacteria from the genera Nostoc and Chroococcus. It is characterised by small hemispherical perithecia (averaging 0.46 mm in diameter) that emerge from small areolae, with each perithecium surrounded by a cuff-like structure. The species was formally described in 2008

Atla alpina is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae, and the type species of the genus Atla. Found in Europe, it was formally described as a new species in 2008 by Sanja Savić and Leif Tibell. The type specimen was collected near Djupdalsvallen (Mittåkläppen, Härjedalen, Sweden) at an altitude of 1,170 m (3,840 ft), where it was found growing on northwest-facing, vertical slate rocks. In addition to Sweden, the lichen has been recorded from Scandinavia, Spitsbergen, Novaya Zemlya, Austria, and Germany, at elevations ranging from 345 to 2,700 m

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Circinaria calcarea is a species of crustose lichen in the family Megasporaceae. It was first described as a new species by Carl Linnaeus in his 1753 work Species Plantarum. Linnaeus named it Lichen calcareus, as he classified all lichens in the eponymously named genus. The species has had an extensive taxonomic history, resulting in dozens of synonyms. In 2010, it was placed in its current genus, Circinaria, following molecular phylogenetic analysis of the Megasporaceae. Circinaria calcarea has a cosmopolitan distribution, having been recorded from the Arctic, Asia, Australasia, Europe,

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Circinaria caesiocinerea is a species of crustose lichen belonging to the family Megasporaceae. It was first described as Lecanora caesiocinerea in 1869 by William Nylander, but was transferred to the genus Circinaria in 2010 by Anders Nordin, Sanja Savić, and Leif Tibell.

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