{{Short description|Species of lichen}} {{Use dmy dates|date=November 2022}} {{Speciesbox | image = | image_caption = | taxon = Pyxine pustulata | authority = [[André Aptroot|Aptroot]] & Jungbluth (2014) }}

'''''Pyxine pustulata''''' is a species of [[corticolous lichen|corticolous]] (bark-dwelling), [[foliose lichen]] in the family [[Caliciaceae]].<ref name="CoL"/> Found in [[Botucatu]], Brazil, it was [[species description|formally described]] as a new species in 2014 by lichenologists [[André Aptroot]] and Patrícia Jungbluth. The [[type (biology)|type specimen]] was collected by the authors from the botanical garden on the campus of Botucatu ([[São Paulo (state)|São Paulo]]) at an altitude of {{convert|850|m|ft|abbr=on}}.<ref name="Aptroot et al. 2014"/>

==Description== The lichen has a pale grey, shiny [[thallus]] that is tightly attached to its bark [[substrate (biology)|substrate]]; the lower surface is black, with simple (i.e., unbranched), black [[rhizine]]s that help attach the thallus to its substrate. The lobes comprising the thallus are 0.7–1.2&nbsp;mm wide, with rounded tips, and are sparsely covered with white spots ({{lichengloss|maculae}}). Older parts of lobes develop pustules (pimple or blister-like swellings) that are about 0.1–0.3&nbsp;mm wide and about 0.2–0.6&nbsp;mm high; the [[botanical name|species epithet]] refers to these characteristic structures. The [[cortex (botany)|cortex]] of the thallus contains [[lichexanthone]], a [[lichen product]] that causes it to [[fluoresce]] yellow when lit with a long-wavelength [[UV light]]. ''Pyxine pustulata'' also contains [[terpenoid]] compounds and a [[biological pigment|pigment]], detectable using [[thin-layer chromatography]].<ref name="Aptroot et al. 2014"/>

==References== {{Reflist|refs=

<ref name="CoL">{{Catalogue of Life |id=4QYKN |title=''Pyxine pustulata'' Aptroot & Jungbluth |access-date=16 November 2022}}</ref>

<ref name="Aptroot et al. 2014">{{cite journal |last1=Aptroot |first1=André |last2=Jungbluth |first2=Patrícia |last3=Cáceres |first3=Marcela E.S. |title=A world key to the species of ''Pyxine'' with lichexanthone, with a new species from Brazil |journal=The Lichenologist |volume=46 |issue=5 |year=2014 |doi=10.1017/s0024282914000231 |pages=669–672 |s2cid=85901115 |url=https://www.researchgate.net/publication/269405990}}</ref>

}}

{{Taxonbar|from=Q78185228}}

[[Category:Pyxine|pustulata]] [[Category:Lichen species]] [[Category:Lichens described in 2014]] [[Category:Lichens of Brazil]] [[Category:Taxa named by André Aptroot]]

{{Caliciales-stub}}