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Golubkovia

From Wikipedia, the free encyclopedia

Golubkovia
in the San Gabriel Mountains, Southern California
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Teloschistales
Family: Teloschistaceae
Genus: Golubkovia
S.Y.Kondr., Kärnefelt, Elix, A.Thell & Hur (2014)
Species:
G. trachyphylla
Binomial name
Golubkovia trachyphylla
(Tuck.) S.Y.Kondr., Kärnefelt, Elix, A.Thell, J.Kim, M.H.Jeong, N.N.Yu, A.S.Kondr. & Hur (2014)
Synonyms[1]
  • Caloplaca elegans var. trachyphylla (Tuck.) Fink (1935)
  • Caloplaca trachyphylla (Tuck.) Zahlbr. (1931)
  • Placodium elegans var. trachyphyllum Tuck. (1882)
  • Xanthomendoza trachyphylla (Tuck.) Frödén (2013)

Golubkovia is a single-species fungal genus in the family Teloschistaceae. It contains the species Golubkovia trachyphylla, a rock-dwelling lichen that is found in Asia and North America. This crustose lichen has a yellow-orange thallus that is placodioid in form (i.e., comprising lobes that radiate out from a centre).

Taxonomy

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The genus was circumscribed in 2014 by the lichenologists Sergey Kondratyuk, Ingvar Kärnefelt, John Elix, Arne Thell, and Jae-Seoun Hur. The generic name honours Russian lichenologist Nina Golubkova (1932–2009), who, according to the authors, "made important contributions to lichenology in northern Eurasia".[2] In North America, "sunny straps" is one vernacular name that has been proposed for the species.[3]

Golubkovia belongs to a clade contains the genus Xanthomendoza, with which it shares the characteristic of having a well-developed, thick layer of plectenchyma in the medulla. Unlike Xanthomendoza, Golubkovia does not have a lower cortical layer, it has an upper cortical layer that is scleroplectenchymatous, and it has a prosoplectenchymatous true exciple (the ring-shaped layer surrounding the hymenium). Additionally, the lichen is attached differently to its substrate.[2]

Habitat and distribution

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Golubkovia trachyphylla is a widely distributed lichen found in Asia and North America, where it grows on rocks in arid habitat.[2] It does not show any substrate preference for calcareous or non-calcareous rocks.[3] It has a yellow-orange, crustose thallus that is placodioid in form (i.e., comprising lobes that radiate out from a centre).[2]

Chemistry

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It contains emodin, fallacinal, parietin, parietinic acid, and teloschistin as lichen products, and its cortex reacts K+ (purple) in chemical spot testing.[3]

References

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  1. ^ "Synonymy: Golubkovia trachyphylla (Tuck.) S.Y. Kondr., Kärnefelt, Elix, A. Thell, Jung Kim, M.H. Jeong, N.N. Yu, A.S. Kondr. & Hur, in Kondratyuk, Kärnefelt, Thell, Elix, Kim, Jeong, Yu & Hur, Acta bot. hung. 56(1-2): 164 (2014)". Species Fungorum. Retrieved 3 June 2022.
  2. ^ a b c d Kondratyuk, S.Y.; Karnefelt, I.; Thell, A.; Elix, J.A.; Kim, J.; Jeong, M.-H.; Yu, N.-N.; Kondratiuk, A.S.; Hur, J.-S. (2014). "A revised taxonomy for the subfamily Xanthorioideae (Teloschistaceae, Ascomycota) based on molecular phylogeny". Acta Botanica Hungarica. 56 (1–2). doi:10.1556/ABot.56.2014.1-2.12.
  3. ^ a b c Tripp, Erin A. (2016). Field Guide to the Lichens of White Rocks (Boulder, Colorado). University Press of Colorado. p. 45. ISBN 978-1-60732-553-6.