Pieter Pacificus Gerardus van den Boom

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Waynea giraltiae is a corticolous (bark-dwelling) species of lichen in the family Ramalinaceae. It was first described in 2010 from specimens collected on oak trees in southern Portugal, and was named in honour of Spanish lichen researcher Mireia Giralt. The lichen forms small, scale-like patches on tree bark and is distinguished by its fine covering of tiny hairs and orange-red reaction to certain chemical spot tests. Though initially known only from the southwestern Iberian Peninsula, it has since been found scattered across Europe, including Italy, Slovakia, and Russia, typically growing

Micarea viridileprosa is a species of crustose lichen in the family Ectolechiaceae that was first described in 2001. This crustose lichen is known to grow on bark, wood, and soil, and is distinguishable by its bright greenish soredia.

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Hypotrachyna guatemalensis is a rare species of foliose lichen in the family Parmeliaceae. Found in Guatemala, it was described as new to science in 2011. It grows on tree trunks at about 2,700 metres elevation on Guatemala's Santa María volcano. The species is distinguished by its small size, white interior, and the presence of the rare chemical compound conhypoprotocetraric acid.

Halecania pakistanica is a species of crustose lichen in the family Leprocaulaceae. The lichen forms irregular patches of small, closely packed angular segments with a pale brown to greyish-brown upper surface and scattered fruiting bodies up to 1 mm across. It grows on exposed limestone rocks at high elevations in the Karakoram mountains of northern Pakistan, where it was discovered at about 3,620 m elevation. As of 2012, it remained the only species of its genus recorded from Pakistan.

Halecania lobulata is a species of crustose lichen in the family Leprocaulaceae. The lichen forms small rosettes up to 5 mm across that grow over other crustose lichens on calcareous rocks, with a greyish to yellowish-brown surface that breaks into tiny leaf-like lobes at the margins. It produces isousnic acid and related compounds that give a yellow reaction when tested with potassium hydroxide solution. The species is known from North Korea and South Korea, where it grows on exposed rock outcrops in mixed forests and near waterfalls.

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Caloplaca squamuloisidiata is a species of saxicolous (rock-dwelling) crustose lichen in the family Teloschistaceae. Described as a new species in 2006, it is found in southwestern and northern Europe.

Briancoppinsia is a fungal genus in the family Arthoniaceae. It is monotypic, containing the single species Briancoppinsia cytospora, a lichenicolous fungus that parasitises parmelioid lichens, as well as Cladonia, Lepra, and Lecanora conizaeoides, among others. The species was first described scientifically by Léon Vouaux in 1914 as Phyllosticta cytospora. Its morphology is reminiscent of Phoma cytospora, a lichenicolous coelomycete found on several genera of lichens. However, B. cytospora has several distinct characters, both anatomical, chemical and within DNA sequence that characterised