Sanja Tibell

Atla recondita is a rare alpine species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. It occurs in the central Scandes mountain range in Sweden. The lichen has a thin olive brown-coloured thallus and ascospores with 9–15 transverse septa and 3–4 longitudinal septa. It is not possible to distinguish this species from the similar Polyblastia by morphology alone.

Atla alaskana is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. Found in Alaska, it was formally described as a new species in 2015 by Sanja and Leif Tibell. The type specimen was collected from Sukakpak Mountain (Brooks Range) at an altitude of 776 m (2,546 ft); there, it was found growing on calciferous rock ledges in open dwarf shrub. The lichen has a thick, whitish-grey thallus with a granular to verrucose (warted) texture.

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