Arthoniales
Arthoniales | |
---|---|
Cryptothecia rubrocincta | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Ascomycota |
Class: | Arthoniomycetes |
Order: | Arthoniales Henssen ex D. Hawksw. & O.E. Erikss. (1986) |
Families | |
Andreiomycetaceae Arthoniaceae Chrysotrichaceae Lecanographaceae Opegraphaceae Roccellaceae Roccellographaceae |
The Arthoniales is the second largest order of mainly crustose lichens, but fruticose lichens are present as well.[1] The order contains around 1500 species,[2] while the largest order with lichenized fungi, the Lecanorales, contains more than 14000 species.[3]
Classification
The Arthoniales is one of two
The Arthoniales is the sister group to Dothideomycetes.[6]
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Seynesia erumpens | ||||||||||||||||||||||||||||||||||||||||||||||
Figure 1. Cladogram of the Arthoniales, rooted with Curvularia brachyspora, Cudonia circinans and Seynesia erumpens as the outgroup. The cladogram shows the division of Arthoniales into seven families, based on Hodkinson et al. 2013.[4]
Distribution and habitats
The Arthoniales is distributed in most habitats worldwide, as it ranges at latitudes from arctic to tropical regions.[2] They grow on different types of substrates like bark, wood, rocks, bryophytes and living leaves. The order has adapted to live in both humid forests and dry habitats like savannas and steppes, as well as varying altitudes from sea level to alpine regions.[7] The highest species diversity are known from subtropical coastal areas with a Mediterranean or dry climate.[8][9] The species diversity of the Arthoniales is expected to be higher than currently reported from several areas worldwide like the tropical rain forests.[2]
Ecology
The majority of species in Arthoniales have a
Characters
It is difficult to mention typical morphological characters like fruit body, exiple, hypothecium, hymenium, chemistry, ascospore color and ascospore septation that can be used as uniting traits for delimiting families and genera in the Arthoniales. The reason is that the Arthoniales is an old order and taxa have evolved in parallel for a long time, which gives a high level of homoplasy.[5]
Ascomatal anatomy
The ascomata are usually apothecial and it produces bitunicate asci. The bitunicate asci are thick-walled, with an outer and inner layer. The outer and inner layer of the ascus wall are called exotunica and endotunica, and they separate during ascospore release.[6] The asci usually contains eight ascospores, while the shape and separation of the ascospores are more variating.[13]
Thallus
The majority of the species in Arthoniales are crustose lichens, with a thallus growing tight to the surface. Fruticose lichens have a bushy thallus and are known in Roccellaceae, where it has evolved and been lost multiple times.[14] The thalli among crustose lichens can either grow within the substrate, called endophloedal or it can grow at the surface of the substrate, called epiphloedal.[13]
Genera incertae sedis
The following genera have been tentatively classified in the Arthoniales but have not been placed with any certainty into a family.[15]
- Angiactis Aptroot & Sparrius (2008) – 3 spp.
- Arthophacopsis Hafellner (1998) – 1 sp.
- Bactrospora A.Massal. (1852) – 35 spp.
- Bryostigma Poelt & Döbbeler (1979) – 3 spp.
- Catarraphia A.Massal. (1860) – 1 sp.
- Felipes Frisch & G.Thor (2014) – 1 sp.
- Glyphopsis Aptroot (2014) – 1 sp.
- Gossypiothallon Aptroot (2014) – 1 sp.
- HelminthocarponFée (1837) – 3 spp.
- Hormosphaeria Lév. (1863) – 1 sp.
- Minksia Müll.Arg. (1882) – 2 spp.
- Nipholepis Syd. (1935) – 1 sp.
- Paradoxomyces Matzer (1996) – 1 sp.
- Perigrapha Hafellner (1996) – 5 spp.
- Phacothecium Trevis. (1857) – 1 sp.
- PhoebusR.C.Harris & Ladd (2007) – 1 sp.
- Sporostigma Grube (2001) – 1 sp.
- Synarthonia Müll.Arg. (1891) – 5 spp.
- Synarthothelium Sparrius (2009) – 2 spp.
- Tarbertia Dennis (1974) – 1 sp.
- Trichophyma Rehm (1905) – 2 spp.
- Tylophorella Vain. (1890) – 1 sp.
- Wegea Aptroot & Tibell (1997) – 1 sp.
References
- ISSN 1096-1135.
- ^ doi:10.12705/634.20.
- PMID 18300027.
- ^ .
- ^ S2CID 19367958.
- ^ PMID 17486977.
- Wikidata Q92902450. Archived from the original(PDF) on 22 July 2020.
- .
- S2CID 84038943.
- JSTOR 3244176.
- PMID 20169027.
- ISBN 978-0-9540418-8-5.
- ^ a b Smith, C. W (2009). The lichens of Great Britain and Ireland. British Lichen society London.
- S2CID 84702559.)
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: CS1 maint: multiple names: authors list (link - hdl:10481/61998.