Amandinea

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Genus of lichens

title: "Amandinea" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["amandinea", "lichen-genera", "caliciales-genera", "taxa-described-in-1950", "taxa-named-by-maurice-choisy"] description: "Genus of lichens" topic_path: "general/amandinea" source: "https://en.wikipedia.org/wiki/Amandinea" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of lichens ::

| image = Amandinea punctata 2 - Lindsey.jpg | image_caption = Amandinea punctata | taxon = Amandinea | authority = M.Choisy ex Scheid. & H.Mayrhofer (1993) | type_species = Amandinea coniops | type_species_authority = (Wahlenb.) M.Choisy ex Scheid. & H.Mayrhofer (1993) | subdivision_ranks = Species | subdivision = | synonyms = *Amandinea

Amandinea is a genus of lichenized fungi in the family Caliciaceae. Genetic studies indicates that the genus Amandinea and Buellia are the same, although this is not widely accepted.

Taxonomy

The genus was originally circumscribed by Maurice Choisy in 1950, with Amandinea coniops assigned as the type species. However, the name was published invalidly because it was not accompanied by a Latin description or diagnosis, a requirement of the nomenclatural rules of the time. Christoph Scheidegger and Helmut Mayrhofer published the genus name validly in 1993. The generic name honours French Madame Amandine Manière, an acquaintance of Choisy.

Description

Amandinea species have a crustose thallus ranging from cracked (rimose) to slightly blistered (bullate). The internal white layer (medulla) is iodine-negative (I−), meaning it does not turn blue in the standard iodine test and is therefore non-amyloid. The photosynthetic partner is a green alga, i.e. with small, spherical cells. Sexual fruiting bodies are apothecia with either a margin (rim made of thallus tissue) or a margin (dark, non-thalline rim). These apothecia may be partly sunk into the thallus () or sit on top of it (), with either a broad or narrowed base; the are typically black or nearly so. The tissue beneath the spore layer () is pale to dark brown, sometimes with olive tones.

Inside the apothecia, the is made of paraphyses—microscopic, partitioned threads that run between the spore sacs. These are unbranched or branch only near the tip; the tips are swollen and pigmented, and many bear a dark brown cap. The asci (spore sacs) are club-shaped and of the Lecanora-type; they usually contain eight spores, though four or more than eight may occur. The ascospores are brown and 1-septate (with a single internal cross-wall), sometimes showing a thicker median wall; their surfaces are often finely wrinkled (), a feature that generally requires electron microscopy to see reliably. Asexual reproduction is common via pycnidia (tiny flask-like structures) that produce curved, thread-like conidia up to about 30 μm long. Chemical tests rarely detect secondary metabolites in this genus (norstictic acid is uncommon but occurs in a few species), while most species show no substances detectable by thin-layer chromatography.

Species

, Species Fungorum (in the Catalogue of Life) accepts 94 species of Amandinea. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/e/eb/Amandinea_polyspora-1.jpg" caption="''[[Amandinea polyspora]]''"] ::

Gallery

Image:Amandinea polyspora.jpg|Amandinea polyspora Image:Amandinea punctata-3.jpg|Photograph of a cross section of an apothecium from A. punctata taken through a compound microscope, x400. (The exciple is uniformly pigmented dark brown; the epihymenium is brown; the hypothecium is brown black.) Image:Amandinea polyspora-2.jpg|Photograph of a cross section of an apothecium of A. polyspora through a compound microscope (x1000) showing 25+ spores per ascus Image:Amandinea punctata-4.jpg|Photograph of a cross section of an apothecium of A. punctata taken through a compound microscope (x1000), showing 8 brown 1-septate spores per ascus.

References

References

  1. Scheidegger, C. 2009. Amandinea Choisy ex Scheid. & H. Mayrhofer (1993). In: C. W. Smith, A. Aptroot, B. J. Coppins, A. Fletcher, O. L. Gilbert, P. W. James and P. A. Wosley (eds.) The Lichens of Great Britain and Ireland. The British Lichen Society, Natural History Museum Publications, United Kingdom, pp. 142–144
  2. Amandinea punctata in the Joshua Tree National Park (California, U.S.A.) Map collection: Kerry Knudsen, Kocourková Jana; Czech University of Life Sciences Prague, Faculty of Environmental Sciences, Department of Ecology, Czech Republic; 2012
  3. (2021). "Caliciales: Caliciaceae, including the genera ''Acolium'', ''Amandinea'', ''Buellia'', ''Calicium'', ''Diploicia'', ''Diplotomma'', ''Endohyalina'', ''Monerolechia'', ''Orcularia'', ''Pseudothelomma'', ''Rinodina'' and ''Tetramelas''". Revisions of British and Irish Lichens.
  4. Choisy, M.. (1950). "Catalogue des lichens de la région Lyonnaise. Fasc. 3". Bulletin Mensuel de la Société Linnéenne de Lyon.
  5. "''Amandinea''".
  6. Elix, J.A.. (2017). "Two new species and new records of buellioid lichens (Physciaceae, Ascomycota) from Macquarie Island". Australasian Lichenology.
  7. (2000). "''Amandinea crassiuscula'', a new corticolous species from the Iberian Peninsula". The Lichenologist.
  8. (2011). "''Amandinea myrticola'', a new corticolous species from Portugal". The Lichenologist.
  9. (2015). "''Amandinea lobarica'', a new corticolous species from Guatemala, with notes on some additional ''Amandinea'' taxa". The Lichenologist.
  10. Hertel, Hannes. (2012). "Gattungseponyme bei Flechten und Lichenicolen Pilzen". J. Cramer.
  11. "Record Details: ''Amandinea'' M. Choisy, Bull. mens. Soc. linn. Soc. Bot. Lyon 19: 16 (1950)". [[Index Fungorum]].
  12. (1994). "Notes on ''Amandinea petermannii'' comb.nov. (Physciaceae) from Antarctica". The Lichenologist.
  13. Scheidegger, Christoph. (1993). "A revision of European saxicolous species of the genus ''Buellia'' De not. and formerly included genera". The Lichenologist.
  14. Şenkardeşler, Ayhan. (2010). "Additions and corrections of types in the genus ''Buellia'' s. lat. ( Physciaceae ) described by J. Steiner". The Lichenologist.
  15. (2021). "Lichen diversity of crustose Caliciaceae and Physciaceae from Alentejo, the Azores and Madeira (Portugal) including the new ''Amandinea madeirensis''". Herzogia.
  16. (2020). "Outline of Fungi and fungus-like taxa". Mycosphere.

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