Biology:Redingeria

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Redingeria is a genus of lichen-forming fungi in the family Graphidaceae.[1] Established in 2006 and named after the Austrian botanist Karl Martin Redinger, the genus contains ten species that grow as bark-dwelling lichens in tropical forests worldwide. These lichens are distinguished by their script-like, elongated fruiting structures with thick black borders and are sensitive to forest disturbance, serving as indicators of undisturbed woodland habitats.

Taxonomy

The genus Redingeria was circumscribed in 2006 by Andreas Frisch, with Redingeria leiostoma assigned as the type species. The genus name honours Karl Martin Redinger (1907–1940), an Austrian botanist.[2]

Description

Redingeria develops a smooth, [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] pale grey to yellow-olive crust (thallus) seated directly on the bark and lacking a true [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. Its elongate, often slightly curved [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are 1–4 mm long, bordered by thick, charcoal-black ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) walls so the script-like slits stand out sharply against the thallus. A colourless to pale brown [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] lines the interior, while the hymenium is distinctly [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] with minute oil droplets that give a cloudy aspect under the microscope. The thin-walled, Graphis-type asci hold eight hyaline ascospores that become markedly [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]—partitioned by numerous transverse and a few longitudinal septa—yet remain iodine-negative (I–) and typically measure 30–70 × 8–15 μm. Secondary chemistry is moderate: many species produce stictic acid or norstictic acid, occasionally accompanied by trace protocetraric-series depsidones that tint the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] yellow-brown.[3]

The mix of fully carbonised lirellae, a clearly inspersed hymenium and large, I– muriform spores distinguishes Redingeria from superficially similar script lichens. Glyphis and Hemithecium share black margins but lack hymenial inspersion; Acanthothecis and Anomomorpha possess [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (spiny) [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and often iodine-positive elements; whereas Kalbographa is set apart by its bright orange anthraquinone [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].

Ecology

The genus has a pantropical distribution, with records from lowland Amazonian rainforest, West and Central African evergreen forests, Indo-Malayan dipterocarp stands and wet sclerophyll woodlands in Queensland. All known species are corticolous, occupying shaded boles and large branches where high humidity and limited direct sunlight prevail. Field surveys show that populations decline rapidly after canopy opening or repeated burning, so the presence of Redingeria is a useful indicator of long-established, relatively undisturbed forest habitat.[3]

Species

As of June 2025, Species Fungorum (in the Catalogue of Life) accept ten species of Redingeria.[1]

  • Redingeria deightonii (C.W.Dodge) Frisch (2006)
  • Redingeria desseiniana Van den Broeck, Lücking & Ertz (2014)[4] – Democratic Republic of the Congo
  • Redingeria glaucoglyphica (Sipman) Frisch (2006)
  • Redingeria glyphica (Nyl.) Frisch (2006)
  • Redingeria krempelhuberi (Redinger) Frisch (2006)
  • Redingeria leiostoma (Tuck.) Frisch (2006)
  • Redingeria microspora (Zahlbr.) M.Cáceres & Lücking (2012)[5]
  • Redingeria pseudostromatica Lücking, Álvaro & B.Moncada (2023)[6] – Colombia
  • Redingeria uniseptata Kalb (2020)[7]
  • Redingeria vulcani (Hale) Lücking (2012)[8]

References

  1. ↑ 1.0 1.1 "Redingeria". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/77G9. 
  2. ↑ Frisch, A.; Kalb, K. (2006). "A monograph of Thelotremataceae with a complex structure of the columella". Bibliotheca Lichenologica 92: 402. 
  3. ↑ 3.0 3.1 Lücking, Robert; Rivas Plata, Eimy (2008). "Clave y guía ilustrada para géneros de Graphidaceae" (in es). GLALIA 1 (1): 1–39. https://archive.org/details/2008_Glalia_1_1. 
  4. ↑ Broeck, Dries Van Den; Lücking, Robert; Ertz, Damien (2014). "Three new species of Graphidaceae from tropical Africa". Phytotaxa 189 (1): 325–330. doi:10.11646/phytotaxa.189.1.23. Bibcode: 2014Phytx.189..325B. 
  5. ↑ Silva Cáceres, Marcela Eugenia da; Santos Vieira, Tamires dos; De Jesus, Luciana Santos; Lücking, Robert (2012). "New and interesting lichens from the Caxiuanã National Forest in the Brazilian Amazon". The Lichenologist 44 (6): 807–812. doi:10.1017/S0024282912000412. Bibcode: 2012ThLic..44..807S. 
  6. ↑ Lücking, Robert; Álvaro-Alba, Wilson Ricardo; Moncada, Bibiana; Marín-Canchala, Norida Lucia; Tunjano, Sonia Sua; Cárdenas-López, Dairon (2023). "Lichens from the Colombian Amazon: 666 taxa including 28 new species and 157 new country records document an extraordinary diversity". The Bryologist 126 (2): 242–303. doi:10.1639/0007-2745-126.2.242. 
  7. ↑ Kalb, Kalb (2020). "New or otherwise interesting lichens. VIII. Eight new species, mainly from the family Graphidaceae, and two new records". Archive for Lichenology 18: 1–14. http://fschumm.de/Archive/Vol18_Kalb_New%20lichens%20VIII.pdf. 
  8. ↑ Sipman, Harrie J.M.; Lücking, Robert; Aptroot, André; Chaves, José Luis; Kalb, Klaus; Tenorio, Loengrin Umaña (2012). "A first assessment of the Ticolichen biodiversity inventory in Costa Rica and adjacent areas: the thelotremoid Graphidaceae (Ascomycota: Ostropales)". Phytotaxa 55 (1): 1–214 [18]. doi:10.11646/phytotaxa.55.1.1. Bibcode: 2012Phytx..55....1S. 

Wikidata ☰ Q7305947 entry



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