Biology:Lecanographaceae
Lecanographaceae is a family of mostly lichens (also some lichenicolous fungi) in the order Arthoniales.[1] The family was circumscribed in 2014, prompted by a molecular phylogenetic-based restructuring of the Arthoniales.
Taxonomy
The family Lecanographaceae was first recovered as an independent, strongly supported lineage within the order Arthoniales in a multilocus phylogenetic study that analysed mitochondrial small-subunit, nuclear large-subunit and RPB2 sequence data. Earlier work had recognised the clade informally ("Lecanographaceae") as one of four major offshoots of the Roccellaceae in the loose sense, but statistical support for its monophyly was initially weak. Subsequent broader sampling confirmed the group with greater statistical support, prompting its formal circumscription as a new family in 2014. The circumscription was based on a combination of molecular evidence and a suite of morphological characters, most conspicuously the dark-brown, often pruinose [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] that lack a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and contain branched or anastomosing interascal filaments.[2]
Description
Lecanographaceae species have a crustose thallus, and lack a cortex. Their photobiont partners are a green algae in the family Trentepohliaceae. The ascomata are narrow and furrowed ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) to rounded, and there is no margin around the thallus. The hymenial disc is often exposed, and is often pruinose. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (a layer of sterile tissue that contains the hymenium) is conspicuous, dark brown, usually closed, without a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Interascal filaments are branched or anastomosed. The asci (spore-bearing cells) are cylindrical to club shaped. The ascospores are hyaline, spindle shaped ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]), and feature [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]–thin septa of ascospores that lack a septal plate and are penetrated by cytoplasmic junctions. The cells divide in two equal parts during the spore septation.[2]
Genera
- Alyxoria Ach. ex Gray (1821) – 12 spp.
- Heterocyphelium Vain. (1927) – 2 spp.
- Lecanographa Egea & Torrente (1994)[3] – ca. 40 spp.
- Mixtoconidium Etayo (1995) – 2 spp.
- Phacographa Hafellner (2009)[4] – 3 spp.
- Plectocarpon Fée (1825) – ca. 40 spp.
- Zwackhia Körb. (1855)[5] – 6 spp.
References
- ↑ Wijayawardene, Nalin; Hyde, Kevin; Al-Ani, LKT; Dolatabadi, S; Stadler, Marc; Haelewaters, Danny et al. (2020). "Outline of Fungi and fungus-like taxa". Mycosphere 11: 1060–1456. doi:10.5943/mycosphere/11/1/8.
- ↑ 2.0 2.1 Frisch, Andreas; Thor, Göran; Ertz, Damien; Grube, Martin (2014). "The Arthonialean challenge: Restructuring Arthoniaceae". Taxon 63 (4): 727–744. doi:10.12705/634.20. Bibcode: 2014Taxon..63..727F.
- ↑ Egea, José M.; Torrente, Pilar (1994) (in es). El género de hongos liquenizados Lecanactis (Ascomycotina). Bibliotheca Lichenologica. 54. p. 116. ISBN 978-3-443-58033-9.
- ↑ Hafellner, J. (2009). "Phacothecium resurrected and the new genus Phacographa (Arthoniales) proposed". Diversity of Lichenology – Anniversary Volume. Bibliotheca Lichenologica. 100. Berlin/Stuttgart: J. Cramer. pp. 85–121. ISBN 978-3-443-58079-7.
- ↑ Körber, G.W. (1855) (in de). Systema lichenum Germaniae. Breslau, Trewendt & Granier. p. 285. https://www.biodiversitylibrary.org/page/23747963.
Wikidata ☰ Q28872112 entry
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