Tor Tønsberg

Japewia is a genus of lichen-forming fungi in the family Lecanoraceae. The genus was circumscribed in 1990 by the Norwegian lichenologist Tor Tønsberg, who assigned J. tornoënsis as the type species. The new genus is named in honour of Peter Wilfred James, a notable lichenologist, with Japewia being derived from the first letters of his initials (Ja) and his surname (Pe) followed by a typical Latin suffix (-wia).

Peltigera britannica is a species of foliose lichen belonging to the family Peltigeraceae. It is native to Europe and North America.

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Xylographa soralifera is a species of bark-dwelling, crustose lichen in the family Xylographaceae. It was described in 2008 and belongs to the X. vitiligo complex, but differs from that species in both morphology and chemistry, including its production of fumarprotocetraric acid.

Vainionora americana is a species of crustose lichen in the family Lecanoraceae that is found in the United States. It was described as a species new to science in 2004 by the lichenologists Klaus Kalb, Tor Tønsberg, and John Alan Elix. The type was collected by Tønsberg from the southern Appalachian Mountains of North Carolina, where it was found growing on the bark of a maple tree. It was later recorded in Alabama. Vainionora americana has a crustose thallus that is greenish-gray in color, and soralia that are relatively large and convex. It produces atranorin and two xanthones as secondary

Myochroidea is a genus of lichen-forming fungi of uncertain familial placement in the order Lecanorales. It has four species of grey or brown-grey crustose lichens.

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Lepraria jackii is a species of leprose lichen in the family Stereocaulaceae, described by Tor Tønsberg in 1992. It forms a powdery thallus with variable colouration, ranging from pale green to straw-coloured, and grows on bark, mosses, wood, and rock surfaces in humid, sheltered environments. The species is characterised by its abundant soredia and distinctive secondary metabolites, including atranorin. Lepraria jackii has been recorded across Europe, North America, Asia, and Australia, preferring acidic substrates.

Lepraria borealis is a species of leprose lichen in the family Stereocaulaceae, found predominantly in cool climates across Northern Europe, northwestern North America, Greenland, and Antarctica. It primarily grows on acidic rock and moss-covered surfaces, occasionally occurring on soil or other lichens. The species forms a granular crust with abundant soredia and shows considerable chemical variation, typically containing atranorin and rangiformic acid.

Lepraria bergensis is an uncommon crustose lichen in the family Stereocaulaceae. It occurs in Northern and Central Europe, where it grows on siliceous (silicon-rich) rock walls, particularly under small overhangs, and on mosses on vertical to slightly sloping rock surfaces. The lichen thallus forms as a pale bluish-grey crust-like growth on rocks and mosses. The lichen begins as small, rounded patches a few millimetres wide, which may eventually coalesce into larger areas exceeding 1 centimetre in diameter. The thallus has a powdery texture, consisting of minute granules known as soredia and

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Buellia arborea is a species of crustose lichen in the family Caliciaceae. It is found in Northern Europe and western North America.

Biatora aureolepra is a species of lichen in the family Ramalinaceae, first found in inland rainforests of British Columbia. This lichen forms thin, powdery crusts that are bright yellow-green when fresh but fade to golden tones over time, and it has never been observed producing fruiting bodies. It grows on the bark and decaying wood of conifers in very humid, old-growth forests and has a scattered distribution in northwestern North America, central Norway, and Austria.

Micarea leucopoda is a rare species of lichen in the family Ectolechiaceae. It is characterised by its distinctive granular body that appears dark greenish to greyish green and its unique stalked reproductive structures with black, spoon-shaped heads on whitish stalks. First described in 2002, this lichen grows primarily on the twigs of spruce and fir trees in humid coniferous forests across an amphi-Atlantic distribution, being found in coastal regions of central Norway and Newfoundland, Canada. The species typically occurs in older, undisturbed forests with high humidity, where it forms

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Lepraria xerophila is a species of leprose lichen in the family Stereocaulaceae. Found in Europe and northwestern North America, it was formally described as a new species in 2004 by the Norwegian lichenologist Tor Tønsberg.

Lepraria lanata is a species of leprose lichen in the family Stereocaulaceae. It occurs in the eastern United States, where it grows most on rock surfaces, and occasionally on soil or mosses.

Lepraria elobata is a species of leprose lichen in the family Stereocaulaceae. It occurs in Europe, North America, and Greenland. The bluish- to greenish-grey, powdery lichen grows on bark and sometimes on soil, wood, siliceous rock and mosses, usually in shady and humid habitats.

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Biatora pontica is a species of corticolous (bark-dwelling), leprose lichen in the family Ramalinaceae. It is a widely distributed species, having been recorded in Africa, Asia, Europe, and North America.

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