Cetraria aculeata

Cetraria aculeata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Parmeliaceae
Genus: Cetraria
Species:
C. aculeata
Binomial name
Cetraria aculeata
(Schreb.) Fr. (1826)
Synonyms
  • Lichen aculeatus Schreb. (1771)

Cetraria aculeata or the spiny Iceland lichen[1] is a dark brown to black fruticose, soil Iceland lichen from the family Parmeliaceae. The species was first described by German naturalist Johann Christian Daniel Edler von Schreber in 1771 under the name of Lichen aculeatus. Later on, Erik Acharius, the "father of lichenology" gave it a name of Cornicularia aculeata, which lately has been changed to Coelocaulon aculeatum. Finally, the taxonomic revision of Ingvar Kärnefelt and colleagues assigned the species to the genus Cetraria.[2]

The thalli of Cetraria aculeata form shrubby tufts of up to 1–5 cm height, main branches are from 1 to 4 mm wide, terminal branches up to 1 mm wide, chemical tests K - and P -.[3] The species is found fertile, and seems to propagate mainly by thallus fragmentation.[4] Despite the apparent lack of ascospores, which can be dispersed across long distances, C. aculeata has a very wide distribution. It is frequent in open polar and boreal environments from the maritime Antarctic to the high Arctic. At intermediate latitudes it is mostly found in high mountain ecosystems, as well as its distributional range also extends into forest gaps, woodland and steppe ecosystems, or coastal and riparian sand deposits of the Mediterranean and temperate zones.

There are several morphologically very similar and genetically closely related species that are united under the name of Cetraria aculeata complex. It consists of as many as six species: C. muricata, C. crespoae, C. steppae, C. odontella, C. australiensis and not published yet C. panamericana.[5][6] The phenomenon observed is due to existence of so-called cryptic species, which has been reported for many groups of organisms.

Ecology

Cetraria aculeata is a known host to several lichenicolous fungus species, including Lichenopeltella cetrariicola,[7] Acremonium lichenicola, Clypeococcum cetrariae, Didymocyrtis cladoniicola, Didymocyrtis trassii, Endococcus parmeliarum, Lichenoconium eroden, Eonema pyriforme, Katherinomyces cetrariae, Sphaerellothecium aculeatae, and Taeniolella rolfii.[8]

References

  1. ^ "Standardized Common Names for Wild Species in Canada". National General Status Working Group. 2020.
  2. ^ Kärnefelt I., Mattsson J.-E. & Thell A (1992) Evolution and phylogeny of cetrarioid lichens // Plant Systematics and Evolution, 113–160.
  3. ^ Kärnefelt I (1986) The genera Bryocaulon, Coelocaulon and Cornicularia and formerly associated taxa. Opera Botanica, 86, 1–90.
  4. ^ Heinken T (1999) Dispersal Patterns of Terricolous Lichens by Thallus Fragments. The Lichenologist, 31, 603.
  5. ^ Nadyeina O, Lutsak T, Blum O, Grakhov V, Scheidegger C (2013) Cetraria steppe Savicz is conspecific with Cetraria aculeata (Schreb.) Fr. according to morphology, secondary chemistry and ecology. The Lichenologist, 45, 1-13.
  6. ^ Lutsak T, Fernández-Mendoza F, Nadyeina O, Pérez-Ortega S & Printzen C (2012) Cetraria steppe: a lichen species of central Asian steppes, or part of a wider Mediterranean clade of C. aculeata? In Abstracts of the 21st International Symposium ‘‘Biodiversity and Evolutionary Biology’’ of the German Botanical Society (DBG), 126.
  7. ^ Svane, Svanhildur Jónsdóttir; Alstrup, Vagn (2004). "Some lichenicolous fungi from Iceland" (PDF). Acta Botanica Islandica. 14: 53–58.
  8. ^ Khodosovtsev, Alexander; Darmostuk, Valeriy; Suija, Ave; Ordynets, Alexander (2018). "Didymocyrtis trassii sp. nov. and other lichenicolous fungi on Cetraria aculeata". The Lichenologist. 50 (5): 529–540. doi:10.1017/s0024282918000294. S2CID 92840978.

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