Célio Henrique Ribeiro

Parmotrema applanatum is a species of saxicolous (rock-dwelling) foliose lichen in the family Parmeliaceae. Originally described from collections made in Vale do Sol, Brazil, it was introduced as new to science in 2002. The lichen has a grey thallus up to 6 cm (2.4 in) wide, comprising lobes that are 0.2–0.6 mm wide. It grows on tree-shaded rocks in open woods. The species is difficult to collect because the thallus adheres strongly to its substrate. The specific epithet appalantum (Latin for "plane") refers to "the notoriously plane habit of the thalli".

Parmotrema alectoronicum is a species of saxicolous lichen in the family Parmeliaceae that was introduced as new to science in 2002. It was originally described from collections made in Serra do Caraça, Brazil, where it was found growing at an elevation of 1,220 m (4,000 ft). The lichen has a yellowish-green thallus up to 9 cm (3.5 in) wide, comprising lobes that are 2.0–4.0 mm wide. The margins of the lobes have cilia that are up to 1.5 mm long. The specific epithet alectoronicum refers to the presence of alectoronic acid in the medulla. This presence of this compound, as well as usnic acid

Hypotrachyna brueggeri is a species of foliose lichen in the family Parmeliaceae. Described as a new species in 2002, it is known only from the type locality in southeastern Brazil, where it was collected at elevations of 1,000–1,400 m (3,300–4,600 ft). This lichen forms sprawling rosettes 10–15 cm across with broad, overlapping lobes and is distinguished by distinctive branched pustules that give its surface a rough texture. It grows on both tree bark and granite rocks in the moist montane forests of the Mantiqueira and Serra do Mar mountain systems, where persistent fog provides the humid

Hypotrachyna aspera is a species of foliose lichen in the family Parmeliaceae. The lichen forms loose, whitish rosettes with very narrow, finely divided lobes that give it a frilled appearance. It reproduces through small blisters on its surface that burst to release powdery granules containing both fungal and algal cells. Originally discovered in 2002 in the mountains of southeastern Brazil, it grows on acidic rocks in humid, partially shaded areas where moist forest meets open woodland. The species has since been found in several other Latin American countries, including Argentina, Bolivia,

Canoparmelia albomaculata is a species of lichen in the family Parmeliaceae. This species is very similar to the apostulate Canoparmelia caroliniana, showing the same colour, size and reticulate maculae. C. caroliniana, however, has true isidia. Big coralloid pustules that in some cases become sorediate are a characteristic feature for C. albomaculata.

Parmotrema zicoi is a species of saxicolous lichen in the family Parmeliaceae. Found in Brazil, it was introduced as new to science in 2002.

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Hypotrachyna angustissima is a species of foliose lichen in the family Parmeliaceae. This species is characterised by the occurrence of usnic acid in its cortex, and salazinic acid in its medulla and laminal isidia. In this it resembles Hypotrachyna microblasta, but the latter has wider laciniae and larger apothecia, and is laterally overlapping. Its epithet angustissima is derived from the Latin angusti, meaning "narrow", due to this species' very narrow laciniae.

Canoparmelia cassa is a species of foliose lichen in the family Parmeliaceae. This species is characteristic by the occurrence of isidia together with fatty acids. It is similar externally to Canoparmelia amazonica. Its epithet cassa is derived from the Latin cassus, meaning "devoid", due to this species' lack of medullar reactive substances.

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