Byssoloma

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Genus of lichen

title: "Byssoloma" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["pilocarpaceae", "lichen-genera", "lecanorales-genera", "taxa-described-in-1853", "taxa-named-by-vittore-benedetto-antonio-trevisan-de-saint-léon"] description: "Genus of lichen" topic_path: "general/pilocarpaceae" source: "https://en.wikipedia.org/wiki/Byssoloma" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of lichen ::

| image = Byssoloma leucoblepharum - Flickr - pellaea.jpg | image_caption = Byssoloma leucoblepharum | taxon = Byssoloma | authority = Trevis. (1853) | type_species = Byssoloma leprieurii | type_species_authority = Trevis. (1853) | subdivision_ranks = Species | subdivision = See text | synonyms_ref = | synonyms = *Calidia Stirt. (1876)

Byssoloma is a genus of leaf-dwelling lichens in the family Pilocarpaceae.

Taxonomy

The genus was circumscribed by the Italian botanist Vittore Benedetto Antonio Trevisan de Saint-Léon in 1853.

Description

Species in genus Byssoloma form crustose, effuse (spreading) lichens that lack a (outer protective layer). Their , or photosynthetic partner, is of the type, a form of green algae.

The apothecia (fruiting bodies), are (directly attached to the thallus without a stalk) and approximately circular in shape. They lack a (a rim formed by the lichen thallus) and possess a , which is a layer of loosely arranged hyphae that can appear hairy or web-like (-) in some species. The hymenium, the spore-bearing tissue, reacts with iodine to turn blue (I+ blue). The , consisting of paraphyses (filamentous support structures), is unbranched or slightly branched and not or only slightly thickened at the tips.

The , a layer beneath the hymenium, is dark red-brown and may turn purple when treated with potassium hydroxide (K) solution in European species. The asci, which are the sac-like structures where spores develop, typically contain eight spores. They have thick walls and a blue-staining apical dome with a darker blue tubular ring structure and an amyloid (starch-like) gelatinous coat.

The are three-septate (having three internal partitions), colourless, and found in European species. Asexual reproductive structures, the pycnidia, are also sessile and roughly spherical, usually covered by a layer of loosely interwoven hyphae. The conidiophores (spore-producing cells) are unbranched, forming flask-shaped, (rod-like), or ellipsoidal conidia (asexual spores) that are constricted in the middle.

Chemically, argopsin, a secondary metabolite (lichen product), is sometimes detected in one species, but otherwise, Byssoloma lacks lichen products.

Species

::figure[src="https://upload.wikimedia.org/wikipedia/commons/9/94/Byssoloma_meadii_-Flickr-_pellaea.jpg" caption="''Byssoloma meadii''"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/f/f4/Byssoloma_subdiscordans_99142347.jpg" caption="''Byssoloma subdiscordans''"] ::

, Species Fungorum accepts 39 species of Byssoloma.

References

References

  1. Aptroot, André. (2014). "Two new genera of Arthoniales from New Caledonia and the Solomon Islands, with the description of eight further species". The Bryologist.
  2. (2013). "''Byssoloma laurisilvae'' und ''Thelotrema lueckingii'', zwei neue Flechtenarten aus Madeira". Österreichische Zeitschrift für Pilzkunde.
  3. Breuss, O.. (2014). "Weitere Flechtenfunde aus Madeira". Stapfia.
  4. (2013). "New lichen species of the genera ''Porina'' and ''Byssoloma'' from an urban Atlantic rainforest patch in Sergipe, NE Brazil". The Lichenologist.
  5. (2022). "Lecanorales: Pilocarpaceae, including the genera ''Aquacidia'', ''Byssoloma'', ''Fellhanera'', ''Fellhaneropsis'', ''Leimonis'' and ''Micarea''".
  6. "''Byssoloma''".
  7. (2018). "Ten new lichen species (Ascomycota) from Australia". Australasian Lichenology.
  8. (1993). "Five new foliicolous lichen species". Folia Geobotanica et Phytotaxonomica.
  9. (1990). "Die Flechtengattung Byssoloma in der Neotropis (eine taxonomisch-phytogeographische Studie)". Nova Hedwigia.
  10. (1994). "Beiträge zur Kenntnis der foliicolen Flechten australischer Regenwälder IV". Bulletin de la Société Linnéenne de Provence.
  11. (2000). "Foliikole Flechten aus Brasilien (vornehmlich Amazonien), inklusive einer Checkliste und Bemerkungen zu ''Coenogonium'' und ''Dimerella'' (Gyalectaceae)". Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie.
  12. Lücking, Robert. (2006). "Foliicolous lichens from French Guiana (northeastern South America)". Cryptogamie Mycologie.
  13. Lücking, Robert. (2008). "Foliicolous Lichenized Fungi". New York Botanical Garden Press.
  14. (2011). "One hundred new species of lichenized fungi: a signature of undiscovered global diversity". Phytotaxa.
  15. (2007). "''Byssoloma rubromarginatum'' (Pilocarpaceae: Ascomycota), a new corticolous species from ''Nothofagus'' forests in Argentina". Mycological Progress.
  16. (2003). "New species of foliicolous lichens from "La Amistad" Biosphere Reserve, Costa Rica". Willdenowia.
  17. Sérusiaux, E.. (1979). "Two new foliicolous lichens From tropical Africa". The Lichenologist.
  18. Sérusiaux, E.. (1998). "Deux nouvelles espèces de ''Byssoloma'' Trev. (lichens, Pilocarpaceae) d'Europe occidentale et de Macaronésie". Cryptogamie Bryologie Lichénologie.
  19. (2002). "''Byssoloma llimonae'' sp nov., from continental Spain, Madeira and the Canary Islands". The Lichenologist.
  20. (1991). "New lichens and lichen records from New Guinea". Willdenowia.
  21. "Synonymy: ''Byssoloma'' Trevis., Spighe Paglie: 6 (1853)". [[Species Fungorum]].
  22. (2000). "The foliicolous lichen flora of Japan". Symbolae Botanicae Upsalienses.
  23. Trevisan de Saint-Léon, V.. (1853). "Spighe e Paglie. Scritti Botanici Varj".
  24. Van den Boom, P.P.G.. (2016). "Lichens and lichenicolous fungi of the Azores (Portugal), collected on São Miguel and Terceira with the descriptions of seven new species". Acta Botanica Hungarica.
  25. Vězda, A.. (1987). "Foliicole Flechten aus Zaire (III). Die Gattung ''Byssoloma'' Trevisan". Folia Geobotanica et Phytotaxonomica.
  26. (2020). "A molecular study of the lichen genus ''Byssoloma'' Trevisan (Pilocarpaceae) with descriptions of three new species from China". The Lichenologist.
  27. (2020). "Outline of Fungi and fungus-like taxa". Mycosphere.

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