{{Short description|Species of lichen}} {{Use dmy dates|date=December 2022}} {{EngvarB|date=December 2022}} {{Speciesbox | image = | image_caption = | taxon = Diorygma tocantinsense | authority = S.C.Feuerst., I.P.R.Cunha, [[André Aptroot|Aptroot]] (2014) | mapframe = yes | mapframe-zoom = 4 | mapframe-coordinates = {{coord|5|44|56.90|S|47|32|25|W}} | mapframe-caption = [[Holotype]]: Itaguatins, Brazil }}

'''''Diorygma tocantinsense''''' is a species of [[corticolous lichen|corticolous]] (bark-dwelling) [[lichen]] in the family [[Graphidaceae]].<ref name="CoL"/> Found in Brazil, it was [[species description|formally described]] as new to science in 2014 by the lichenologists Shirley Feuerstein, Iane Cunha, and [[André Aptroot]]. The [[type (biology)|type specimen]] was collected by Feuerstein from Fazenda São Paulo ([[Itaguatins]], [[Tocantins|state of Tocantins]]), where it was found growing on tree bark. The lichen has an opaque, irregular, whitish-cream [[thallus]] that lacks [[soredia]] and [[isidia]]. It is characterised from other ''[[Diorygma]]'' species by its [[ascospore]]s, which measure 24–40 by 10–15&nbsp;[[micrometre|μm]] and are {{lichengloss|muriform}} (divided into multiple compartments by both longitudinal and transverse [[septum|septa]]); most species in the genus have considerably larger spores. Additionally, this species contains [[protocetraric acid]], a [[lichen product]] that can be detected using [[thin-layer chromatography]]. Its positive [[spot test (lichen)|spot test]] reactions are K+ (deep yellow) and P+ (orange).<ref name="Feuerstein et al. 2014"/>

==References== {{Reflist|refs=

<ref name="CoL">{{Catalogue of Life |id=36C4H |title=''Diorygma tocantinsense'' S.C. Feuerst., I.P.R. Cunha & Aptroot |access-date=12 December 2024}}</ref>

<ref name="Feuerstein et al. 2014">{{cite journal |last1=Feuerstein |first1=Shirley Cunha |last2=Cunha-Dias |first2=Iane Paula Rego |last3=Aptroot | first3=André |last4=Eliasaro |first4=Sionara |last5=Cáceres |first5=Marcela Eugenia da Silva |title=Three new ''Diorygma'' (Graphidaceae) species from Brazil, with a revised world key |journal=The Lichenologist |volume=46 |issue=6 |year=2014 |doi=10.1017/s002428291400036x |pages=753–761}}</ref>

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{{Taxonbar|from=Q107638518}}

[[Category:Diorygma|tocantinsense]] [[Category:Lichen species]] [[Category:Lichens described in 2014]] [[Category:Lichens of North Brazil]] [[Category:Taxa named by André Aptroot]]

{{Lecanoromycetes-stub}}