# Pyxine pustulata

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Species of lichen

Pyxine pustulata Scientific classification Kingdom: Fungi Division: Ascomycota Class: Lecanoromycetes Order: Caliciales Family: Caliciaceae Genus: Pyxine Species: P. pustulata Binomial name Pyxine pustulata Aptroot & Jungbluth (2014)

***Pyxine pustulata*** is a species of [corticolous](/source/Corticolous_lichen) (bark-dwelling), [foliose lichen](/source/Foliose_lichen) in the family [Caliciaceae](/source/Caliciaceae).[1] Found in [Botucatu](/source/Botucatu), Brazil, it was [formally described](/source/Species_description) as a new species in 2014 by lichenologists [André Aptroot](/source/Andr%C3%A9_Aptroot) and Patrícia Jungbluth. The [type specimen](/source/Type_(biology)) was collected by the authors from the botanical garden on the campus of Botucatu ([São Paulo](/source/S%C3%A3o_Paulo_(state))) at an altitude of 850 m (2,790 ft).[2]

## Description

The lichen has a pale grey, shiny [thallus](/source/Thallus) that is tightly attached to its bark [substrate](/source/Substrate_(biology)); the lower surface is black, with simple (i.e., unbranched), black [rhizines](/source/Rhizine) that help attach the thallus to its substrate. The lobes comprising the thallus are 0.7–1.2 mm wide, with rounded tips, and are sparsely covered with white spots ([maculae](/source/Glossary_of_lichen_terms#maculae)). Older parts of lobes develop pustules (pimple or blister-like swellings) that are about 0.1–0.3 mm wide and about 0.2–0.6 mm high; the [species epithet](/source/Botanical_name) refers to these characteristic structures. The [cortex](/source/Cortex_(botany)) of the thallus contains [lichexanthone](/source/Lichexanthone), a [lichen product](/source/Lichen_product) that causes it to [fluoresce](/source/Fluoresce) yellow when lit with a long-wavelength [UV light](/source/UV_light). *Pyxine pustulata* also contains [terpenoid](/source/Terpenoid) compounds and a [pigment](/source/Biological_pigment), detectable using [thin-layer chromatography](/source/Thin-layer_chromatography).[2]

## References

1. **[^](#cite_ref-CoL_1-0)** ["*Pyxine pustulata* Aptroot & Jungbluth"](https://www.catalogueoflife.org/data/taxon/4QYKN). *[Catalogue of Life](/source/Catalogue_of_Life)*. [Species 2000](/source/Species_2000): Leiden, the Netherlands. Retrieved 16 November 2022.

1. ^ [***a***](#cite_ref-Aptroot_et_al._2014_2-0) [***b***](#cite_ref-Aptroot_et_al._2014_2-1) Aptroot, André; Jungbluth, Patrícia; Cáceres, Marcela E.S. (2014). ["A world key to the species of *Pyxine* with lichexanthone, with a new species from Brazil"](https://www.researchgate.net/publication/269405990). *The Lichenologist*. **46** (5): 669–672. [doi](/source/Doi_(identifier)):[10.1017/s0024282914000231](https://doi.org/10.1017%2Fs0024282914000231). [S2CID](/source/S2CID_(identifier)) [85901115](https://api.semanticscholar.org/CorpusID:85901115).

Taxon identifiers Pyxine pustulata Wikidata: Q78185228 Wikispecies: Pyxine pustulata CoL: 4QYKN GBIF: 10888466 IndexFungorum: 808448 MycoBank: 808448 SpeciesFungorum: 808448

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