Opeltiella

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Opeltiella
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Candelariomycetes
Order: Candelariales
Family: Candelariaceae
Genus: Opeltiella
S.Y.Kondr. (2020)
Type species
Opeltiella fruticans
(Poelt & Oberw.) S.Y.Kondr. (2020)
Species

O. canadensis
O. fibrosoides
O. fruticans
O. rubrisoli

Contents

Opeltiella is a genus of lichen-forming fungi in the family Candelariaceae. [1] The genus, established by Sergey Kondratyuk in 2020, has four species. [2] It is differentiated from the similar genus Candelaria by its unique features such as eight-spored asci and absence of a lower cortical layer and true rhizines. The genus is characterised by its areolate to more or less squamulose or foliose thallus and the unique chemical substances it contains, such as calycin, pulvinic and vulpinic acids, and pulvinic acid lactone.

Taxonomy

The genus Opeltiella was circumscribed by Ukrainian lichenologist Sergey Kondratyuk, with Opeltiella fruticans serving as the type species. Its name is derived from an anagram of the generic name Poeltia, which pays homage to Josef Poelt (1924–1995), a significant figure in the history of lichenology and a co-author of the type species of this genus. Opeltiella shares a relationship with Candelaria based on multigene molecular phylogenetics data but is distinguished by its unique features such as the lack of a lower cortical layer and true rhizines. [3]

Multigene phylogeny data supports Opeltiella as a robust, distinct monophyletic branch, positioned separately from Candelaria, which only includes polyspored species with well-developed lower cortical layers and true rhizines. In the phylogeny derived from nuclear ribosomal internal transcribed spacer (nrITS) sequences, Opeltiella occupies a sister position to the 'Candelariella' placodizans group. [3]

Description

Opeltiella is recognised by its areolate to somewhat squamulose or somewhat foliose thallus, which is irregularly incised and can range from being adnate to ascending or more or less erect. Its upper surface is yellow, matte, and smooth; it may lack soredia and isidia or can display a sorediate lower surface. The lower surface of the thallus is white, lacks a cortex, and ranges from being arachnoid to tomentose with a thick mat of hyphal strands. The apothecia of Opeltiella are lecanorine and its asci are 8-spored. The ascospores are simple to 1-septate, narrowly ellipsoid, and the conidia are ellipsoid, measuring 2.0–3.5 by 1.5  μm. [3]

Habitat and distribution

The genus Opeltiella includes four species, with two located in South America, one in Eastern Asia, and another in North America. There is an indication that one species, Opeltiella canadensis, might be included in a different genus in the future. Opeltiella lichens can be found in various habitats, ranging from dead shrubs and cacti, sometimes cohabiting with Teloschistes hosseusianus in dry high-altitude pasture lands of about 2,200 m (7,200 ft) above sea level, as well as on the bark of deciduous trees and pine trees in lowlands and coastal zones. [3]

Species

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References

  1. ↑ "Opeltiella". Catalogue of Life . Species 2000: Leiden, the Netherlands. Retrieved 11 June 2023.
  2. ↑ Wijayawardene, N.N.; Hyde, K.D.; Dai, D.Q.; Sánchez-García, M.; Goto, B.T.; Saxena, R.K.; et al. (2022). "Outline of Fungi and fungus-like taxa – 2021". Mycosphere. 13 (1): 53–453. doi: 10.5943/mycosphere/13/1/2 . S2CID   249054641.
  3. 1 2 3 4 Kondratyuk, S.Y.; Lőkös, L.; Jeong, M.-H.; Oh, S.-O.; Kondratiuk, A.S.; Hur, J.-S. (2020). "Contributions to molecular phylogeny of lichen-forming fungi, 1. The family Candelariaceae" (PDF). Acta Botanica Hungaricae. 62 (3–4): 293–307. doi:10.1556/034.62.2020.3-4.4. S2CID   228989603.
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