Eimy Rivas Plata

Malmideaceae is a family of crustose and corticolous lichens in the order Lecanorales. It contains eight genera and about 70 species.

Malmidea is a genus of crustose lichens and the type genus of the family Malmideaceae. It was established in 2011 to contain a phylogenetically distinct group of species formerly placed in the genus Malcolmiella. The crust-like thallus of Malmidea lichens has a surface that varies from smooth to rough, featuring textures such as verrucose (wart-like), granulose (grainy), or pustulate (pimpled). These textures are often formed by goniocysts, which are spherical clusters of green algal cells from the family Chlorococcaceae, encased in fungal hyphae. Malmidea comprises nearly 70 mostly tropical

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Wirthiotrema is a genus of lichen-forming fungi in the family Graphidaceae. These tropical bark-dwelling lichens form yellow-green to light olive crusts with small, disc-like fruiting bodies that open through tiny circular pores. The genus contains six species found in lowland to mountain forests across tropical regions worldwide.

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Heiomasia is a genus of corticolous (bark-dwelling), crustose lichens in the family Graphidaceae. It has five species.

Halegrapha chimaera is a species of script lichen in the family Graphidaceae. It forms a thin, whitish-grey crust on tree bark and produces black, elongated, slit-like fruiting bodies. The species is the type of its genus, Halegrapha, which was named in honour of the American lichenologist Mason Hale. It is known only from lower montane rainforest on Luzon in the Philippines.

Halegrapha is a genus of lichen-forming fungi in the family Graphidaceae. It comprises ten species. Members of the genus form pale grey to whitish thalli that are often strongly encrusted with calcium oxalate crystals, and produce black, script-like fruiting bodies (lirellae) that resemble those of Graphis. Microscopic features and DNA evidence, however, place Halegrapha among a different lineage of graphid lichens allied to Phaeographis. Species are known mainly from humid forest habitats in scattered tropical and temperate localities worldwide.

Fissurina pseudostromatica is a lichen that forms a thin, crust-like growth on bark and belongs to the family Graphidaceae. It was first described from subtropical Florida. It forms pale clusters of very small, immersed lirellae (slit-like fruiting structures) that look like tiny stromata, and standard chemical screening (thin-layer chromatography) did not detect any lichen substances. It has since been reported from Brazil and from Yunnan in southern China.

Diorygma antillarum is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae. It is common and widespread in the Neotropical realm, primarily found on trees in the shady understory and in slightly illuminated habitats of lowland to montane rainforests. It produces norstictic acid and salazinic acid.

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Trinathotrema is a genus of lichen-forming fungi in the family Stictidaceae. It has three species. The genus was circumscribed in 2011 by Robert Lücking, Eimy Rivas Plata, and Armin Mangold, with Trinathotrema stictideum assigned as the type species. The genus name is an imperfect anagram in honour of American lichenologist Thomas Nash III, combining the letters -tho, -na, and -tri. Although most members of the Stictidaceae have chlorococcoid green algae as their photobiont partner, Trinathotrema associates with a trentepohlioid photobiont.

Tapellaria granulosa is a species of corticolous (bark-dwelling) crustose lichen in the family Ectolechiaceae. It was described from subtropical Florida and has a pale green thallus (lichen body) that is densely covered with fine, granule-like outgrowths. It also has black apothecia (disk-like fruiting bodies) and muriform ascospores (spores divided into many small compartments).

Ocellularia vizcayensis is a rare species of corticolous (bark-dwelling) lichen in the family Graphidaceae. It is known from a single collection made in Luzon, Philippines. The lichen thallus is a white, irregularly structured, areolate surface with a layer that includes a photosynthetic partner, both containing large calcium oxalate crystals. Its fruiting bodies are either embedded or protruding, round, with very narrow openings, and contain large, oblong, colorless spores that turn violet-blue when stained with iodine.

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Glaucotrema is a genus of lichen-forming fungi in the family Graphidaceae. It has five species.

Fissurina nigrolabiata is a species of lichen-forming fungus in the family Graphidaceae. It was first discovered in 2011 in the mountain rainforests of the Philippines, where it grows as a thin greenish crust on tree bark. The species has since been found in Brazil, and produces its spores in distinctive black-lipped slits that protrude slightly from the bark surface.

Cruentotrema is a genus of corticolous (bark-dwelling) lichens in the family Graphidaceae. It has seven species.

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