Lecanactis proximans

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Lecanactis proximans
Conservation status
Critically Endangered (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Arthoniomycetes
Order:	Arthoniales
Family:	Roccellaceae
Genus:	Lecanactis
Species:	L. proximans
Binomial name
*Lecanactis proximans* (Nyl.) Zahlbr. (1923)
Synonyms
Lecidea proximans Nyl. (1863)

Lecanactis proximans is a species of terricolous (ground-dwelling) crustose lichen in the family Roccellaceae. It has been assessed as Critically Endangered for the IUCN Red List. It is known only from a single location in the Cerros Orientales [es] (Eastern Hills) of Bogotá, Colombia.

Taxonomy

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The species was first described by William Nylander in 1863 as Lecidea proximans.^[1] It was later transferred to the genus Lecanactis by Alexander Zahlbruckner in 1923.^[2]

Description

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Lecidea proximans is a crustose lichen that grows on soil and is strongly attached to its substrate. It has a powdery to leprose consistency. The apothecia (fruiting bodies) have a thickened margin and greyish pruina. The species grows in shaded areas.^[3]

Conservation

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Lecidea proximans is listed as Critically Endangered (CR) on the IUCN Red List. The species is known from only one location with an estimated area of occupancy of 4 km². Its habitat has been severely affected by logging and urban expansion. Despite recent surveys in similar habitats in the Eastern Hills of Bogotá, the species has not been found again since its original collection by Alejandro Lindig. The main threats to Lecidea proximans are habitat alteration, deforestation, and expansion of agricultural, industrial, and urban areas. The species is protected under Resolution 0213 of 1977, which prohibits its use and commercialisation in Colombia.^[3]

Distribution and habitat

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The species is known only from a single record in the montane humid forests of the Cerros Orientales [es] (Eastern Hills) in Bogotá, Colombia, at an elevation of 2,700 metres above sea level.^[3]

References

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^ Nylander, W. (1863). "Lichenographia novo-granatensis prodromus". Acta Societatis Scientiarum Fennicae (in Latin). 7 (2): 415–504 [463].
^ Zahlbruckner, A. (1923). Catalogus Lichenum Universalis (in Latin). Vol. 2. p. 544.
^ ^a ^b ^c Moncada, B.; Simijaca, D.; Soto-Medina, E.; Coca, L.F.; Jaramillo, M. (2023). "Lecanactis proximans". IUCN Red List of Threatened Species. 2023. Retrieved 3 October 2024.

Taxon identifiers
Lecanactis proximans	Wikidata: Q21273081 Wikispecies: Lecanactis proximans GBIF: 5516240 IndexFungorum: 387310 MycoBank: 387310 Open Tree of Life: 3751500 SpeciesFungorum: 387310
Lecidea proximans	Wikidata: Q59537473 GBIF: 3437592 IndexFungorum: 392021 MycoBank: 392021 Open Tree of Life: 3762327 SpeciesFungorum: 392021

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