Martinjahnsia

Martinjahnsia
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Teloschistales
Family:	Teloschistaceae
Genus:	Martinjahnsia S.Y.Kondr., Fedorenko, S.Stenroos, Kärnefelt, Elix, Hur & A.Thell (2012)
Species:	M. resendei
Binomial name
Martinjahnsia resendei (Poelt & Tav.) S.Y.Kondr., Fedorenko, S.Stenroos, Kärnefelt, Elix, Hur & A.Thell (2012)
Synonyms [1]
Rusavskia resendei(Poelt & Tav.) S.Y.Kondr. & Kärnefelt (2003) Xanthoria resendeiPoelt & Tav. (1968)

Martinjahnsia is a single-species fungal genus in the family Teloschistaceae. ^[2] It contains the sole species Martinjahnsia resendei, a saxicolous (rock-dwelling) crustose lichen.

Taxonomy

This species was first scientifically described in 1968 by Josef Poelt and Carlos das Neves Tavares, who initially classified it in the genus Xanthoria . ^[3] In 2003, Sergey Kondratyuk and Ingvar Kärnefelt proposed to transfer the species to the genus Rusavskia . ^[4] Kondratyuk and colleagues suggested in 2012 that it be placed in a new genus, Martinjahnsia, to accommodate its unique phylogenetic position. The genus name honours German lichenologist Martin Jahns. ^[5]

Habitat and distribution

Martinjahnsia resendei has a Mediterranean distribution. The lichen is abundant in the southeast of Spain, where it colonises sunny rock surfaces, especially those enriched in nitrates. ^[6] In islands of the Tuscan Archipelago, it is typically found on sun-exposed siliceous rocks on the Mediterranean coast. ^[7]

Chemistry

There are several lichen products that have been isolated and chemically characterised from Martinjahnsia resendei. These include peroxyergosterol, the anthraquinone pigments physcion, fallacinal, and fallacinol, and three new unidentified hopene-type triterpenes. ^[8]

References

1. "Synonymy. Current Name: Martinjahnsia resendei (Poelt & Tav.) S.Y. Kondr., Fedorenko, S. Stenroos, Kärnefelt, Elix, Hur & A. Thell, in Fedorenko, Stenroos, Thell, Kärnefelt, Elix, Hur & Kondratyuk, Biblthca Lichenol. 108: 61 (2012)". Species Fungorum . Retrieved 20 September 2023.
2. "Martinjahnsia". Catalogue of Life . Species 2000: Leiden, the Netherlands. Retrieved 20 September 2023.
3. Poelt, J.; Tavares, C.N. (1968). "Xatithoria resendei, eine neue Laubflechte der sudwesteuropaischen Küsten". Portugaliae Acta Biologica B (in German). IX (3–4): 300–307.
4. Kondratyuk, S.Y.; Kärnefelt, I. (2003). "Revision of three natural groups of xanthorioid lichens (Teloschistaceae, Ascomycota)". Ukrainskiy Botanichnyi Zhurnal. 60 (4): 427–437.
5. Fedorenko, Natalya M.; Stenroos, Soili; Thell, Arne; Kärnefelt, Ingvar; Elix, John A.; Hur, Jae-Seoun; Kondratyuk, Sergij Y. (2012). "Molecular phylogeny of xanthorioid lichens (Teloschistaceae, Ascomycota), with notes on their morphology". In Kärnefelt, Ingvar; Seaward, Mark R.D.; Thell, Arne (eds.). Systematics, biodiversity and ecology of lichens. Bibliotheca Lichenologica. Vol. 108. pp. 45–64. ISBN   978-3-443-58087-2.
6. Llimona, X. (1975). "Xanthoria resendei Poelt et Tav. en el se de Espana; fitosociologia y corologia". Anales del Instituto Botánico A. J. Cavanilles (in Spanish). 32 (2): 909–922.
7. Nimis, P.L.; Tretiachi, M.; de Marchi, A. (1990). "Contributions to lichen floristics in Italy – V. The lichens of the islands of Capralia (Tuscan Archipelago)". Cryptogamie, Bryol., Lichenol. 11 (1): 1–30.
8. González, Antonio G.; Martín, Julio D.; Pérez, Cirilo (1974). "Three new triterpenes from the lichen Xanthoria resendei". Phytochemistry. 13 (8): 1547–1549. Bibcode:1974PChem..13.1547G. doi:10.1016/0031-9422(74)80324-9.