''Stenocybe tropica'' is a species of corticolous (bark-dwelling)

pin lichen Lichens are wikt:composite, composite organisms made up of multiple species: a fungus, fungal partner, one or more photosynthetic partners, and sometimes a yeast, basidiomycete yeast. They are regularly grouped by their external appearance – a c ...

in the family

Mycocaliciaceae The Mycocaliciaceae are a family (biology), family of seven genus, genera and about 90 species of fungi in the order Mycocaliciales. Taxonomy Calicioid fungi are a heterogeneous assemblage of fungi sharing the presence of a mazaedium, a structur ...

. Found in Brazil, it was formally described as a new species in 2015 by Dutch lichenologist

André Aptroot André Aptroot (Heemskerk, 1961) is a Dutch mycologist and lichenologist. In 1993 he did his PhD at the University of Utrecht under the supervision of Robbert Gradstein (nl). His dissertation was titled "Systematic studies on pyrenocarpous li ...

. The type specimen was collected in Praia de Peruíbe near Itanhaém; here it was found growing on mangrove tree bark. The apothecia are black with a cylindrical to club-shaped head (capitulum) about 0.3 mm in diameter and up to 0.5 mm high. The stalk holding the capitulum is glossy black, up to 0.8 mm tall and about 0.15 mm wide. Its ascospores are dark brown in colour, more or less fusiform (spindle-shaped) with 3 septa, measuring 46–71 by 14–21

μm The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...

with mostly pointed tips. No lichen products were detected in the lichen.

References

Eurotiomycetes Lichen species Lichens described in 2015 Lichens of Southeast Brazil Taxa named by André Aptroot {{Eurotiomycetes-stub