{{Short description|Genus of lichens}} {{Automatic taxobox | image = | taxon = Myeloconis | authority = P.M.McCarthy & [[John Alan Elix|Elix]] (1996) | type_species = Myeloconis fecunda | type_species_authority = P.M.McCarthy & Elix (1996) | subdivision_ranks = Species | subdivision = ''[[Myeloconis erumpens|M. erumpens]]''<br /> ''[[Myeloconis fecunda|M. fecunda]]''<br /> ''[[Myeloconis guyanensis|M. guyanensis]]''<br /> ''[[Myeloconis parva|M. parva]]'' }}
'''''Myeloconis''''' is a [[genus]] of [[corticolous lichen|corticolous]] (bark-dwelling), [[crustose lichen]]s in the family [[Porinaceae]]. It has four species.<ref name="Wijayawardene et al. 2022"/> The genus was [[circumscription (taxonomy)|circumscribed]] in 1996 by Patrick M. McCarthy and [[John Alan Elix|John Elix]], with ''[[Myeloconis fecunda|M. fecunda]]'' assigned as the [[type species]]. The genus name, derived from the [[Ancient Greek|Greek]] {{lang|el|myelos}} ("marrow", or "pith") and {{lang|el|konis}} ("dust"), refers to the powdery yellow-orange [[biological pigment|pigments]] in the [[medulla (lichenology)|medulla]].<ref name="McCarthy & Elix 1996"/>
==Description==
Genus ''Myeloconis'' is characterised by several unique features. These include a medulla that contains yellow or orange [[biological pigment|pigments]] that have not been seen in other lichen species before. The fruiting bodies of ''Myeloconis'', known as {{lichengloss|perithecium|perithecioid ascomata}}, have a dark, dense, and almost {{lichengloss|pseudostromata}}l wall. The {{lichengloss|hamathecium}}, which is the part of the ascoma that supports the spores, is free and anastomoses at the base. The [[ascus|asci]] are uniformly thin-walled, and the [[ascospore]]s are elongate and {{lichengloss|muriform}}.<ref name="McCarthy & Elix 1996"/>
Although the exact relationship of ''Myeloconis'' to other lichen genera is not certain, the characteristics of the fruiting bodies and their contents suggest that ''Myeloconis'' may be closely related to the genera ''[[Porina]]'' and ''[[Clathroporina]]'' in the family Porinaceae.<ref name="McCarthy & Elix 1996"/>
==Chemistry==
The new [[phenalenone]] compound, myeloconone A2 (6,7,9-trihydroxy-3,8-dimethoxy-4-methyl-1H-phenalen-1-one), was isolated from ''Myeloconis erumpens''. It is a deep yellow pigment.<ref name="Ernst-Russell et al. 2000"/> [[Leucomyeloconone]] and [[myelocoterpene]] are other [[lichen product]]s found in the genus.<ref name="McCarthy & Elix 1996"/>
==Species==
''Myeloconis'' species occur in lowland tropical forest.<ref name="McCarthy & Elix 1996"/>
* ''[[Myeloconis erumpens]]'' {{au|P.M.McCarthy & Elix (1996)}} – Papua New Guinea * ''[[Myeloconis fecunda]]'' {{au|P.M.McCarthy & Elix (1996)}} – Malaysia * ''[[Myeloconis guyanensis]]'' {{au|P.M.McCarthy & Elix (1996)}} – Guyana * ''[[Myeloconis parva]]'' {{au|P.M.McCarthy & Elix (1996)}} – Brazil
==References== {{Reflist|refs=
<ref name="Ernst-Russell et al. 2000">{{cite journal |last1=Ernst-Russell |first1=Michael A. |last2=Chai |first2=Christina L.L. |last3=Elix | first3=John A. |last4=McCarthy |first4=Patrick M. |title=Myeloconone A2, a new phenalenone from the lichen ''Myeloconis erumpens'' |journal=Australian Journal of Chemistry |volume=53 |issue=12 |year=2000 |doi=10.1071/ch00139 |pages=1011–2013}}</ref>
<ref name="McCarthy & Elix 1996">{{cite journal |last1=McCarthy |first1=P.M. |last2=Elix |first2=J.A. |title=''Myeloconis'', a new genus of pyrenocarpous lichens from the tropics |journal=The Lichenologist |volume=28 |issue=5 |year=1996 |doi=10.1006/lich.1996.0038 |pages=401–414|s2cid=86208164 }}</ref>
<ref name="Wijayawardene et al. 2022">{{cite journal |display-authors=6 |last1=Wijayawardene |first1=N.N. |last2=Hyde |first2=K.D. |last3=Dai |first3=D.Q. |last4=Sánchez-García |first4=M. |last5=Goto |first5=B.T. |last6=Saxena |first6=R.K. |last7=Erdoğdu |first7=M. |last8=Selçuk |first8=F. |last9=Rajeshkumar |first9=K.C. |last10=Aptroot |first10=A. |last11=Błaszkowski |first11=J. |last12=Boonyuen |first12=N. |last13=da Silva |first13=G. |last14=de Souza |first14=F.A. |last15=Dong |first15=W. |last16=Ertz |first16=D. |last17=Haelewaters |first17=D. |last18=Jones |first18=E.B. |last19=Karunarathna |first19=S.C. |last20=Kirk |first20=P.M. |last21=Kukwa |first21=M. |last22=Kumla |first22=J. |last23=Leontyev |first23=D.V. |last24=Lumbsch |first24=H.T. |last25=Maharachchikumbura |first25=S.S.N. |last26=Marguno |first26=F. |last27=Martínez-Rodríguez |first27=P. |last28=Mešić |first28=A. |last29=Monteiro |first29=J.S. |last30=Oehl |first30=F. |last31=Pawłowska |first31=J. |last32=Pem |first32=D. |last33=Pfliegler |first33=W.P. |last34=Phillips |first34=A.J.L. |last35=Pošta |first35=A. |last36=He |first36=M.Q. |last37=Li |first37=J.X. |last38=Raza |first38=M. |last39=Sruthi |first39=O.P. |last40=Suetrong |first40=S. |last41=Suwannarach |first41=N. |last42=Tedersoo |first42=L. |last43=Thiyagaraja |first43=V. |last44=Tibpromma |first44=S. |last45=Tkalčec |first45=Z. |last46=Tokarev |first46=Y.S. |last47=Wanasinghe |first47=D.N. |last48=Wijesundara |first48=D.S.A. |last49=Wimalaseana |first49=S.D.M.K. |last50=Madrid |first50=H. |last51=Zhang |first51=G.Q. |last52=Gao |first52=Y. |last53=Sánchez-Castro |first53=I. |last54=Tang |first54=L.Z. |last55=Stadler |first55=M. |last56=Yurkov |first56=A. |last57=Thines |first57=M. |year=2022 |title=Outline of Fungi and fungus-like taxa – 2021 |journal=Mycosphere |volume=13 |issue=1 |pages=53–453 |doi=10.5943/mycosphere/13/1/2 |s2cid=249054641 |url=https://www.researchgate.net/publication/358798332|doi-access=free |hdl=10481/76378 |hdl-access=free }}</ref>
}}
{{Taxonbar|from=Q10591664}}
[[Category:Gyalectales]] [[Category:Lichen genera]] [[Category:Taxa described in 1996]] [[Category:Gyalectales genera]] [[Category:Taxa named by John Alan Elix]] [[Category:Taxa named by Patrick Martin McCarthy]]