Parmotrema zicoi

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

Taxonomy
It was originally described from collections made in Serra do Caraça, Brazil, where it was found growing at an elevation of 1330 m.

The specific epithet zicoi honours the priest Tobias Zico, who, as a former administrator for the Parque Natural do Caraça, promoted the "preservation of a most important type locality for numerous lichens, animals, and plants in Brazil".

Description
The lichen has a seafoam-green thallus up to 8 cm wide, comprising overlapping lobes that are 2.0–5.0 mm wide. The margins of the lobes have simple cilia that are up to 1 mm long. The cortex contains atranorin, while the medulla contains protocetraric acid. Occasionally, the medullary K spot test reaction is positive, producing a very light yellow colour that indicates the presence of traces of atranorin in the upper part of the medulla near the cortex. P. zicoi has short bacilliform-shaped conidia that are less than 5 μm long. The lichen does not produce any form of vegetative propagation or pustules.