Physciaceae

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Physciaceae
Physcia millegrana, member of the family Physciaceae
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Caliciales
Family: Physciaceae
Zahlbr.
(1898)
Type genus
Michx.
(1803)

The Physciaceae are a

genera and 601 species in the family.[1]

Description

The Physiaceae family includes various

soredia, or may lack them entirely.[2]

The upper

lichen substances. The lower cortex can be prosoplectenchymatous, paraplectenchymatous, or absent, with the lower surface either possessing or lacking rhizines. A prothallus may be present or absent.[2]

Physiaceae lichens produce

ascomata, which can be either apothecia or mazaedia. Their apothecia can be immersed, sessile, or short-stalked, with a more or less distinct exciple. The disc, when present, is generally round and ranges from flat to convex, displaying colours from brown to dark reddish-brown or black. A thalline exciple may or may not be present, while the proper exciple can be thin and weakly pigmented or well-developed and darkly pigmented.[2]

The epihymenium can be brown-black, brown, or green, while the hymenium is colourless or partly green, with or without oil droplets. The hypothecium can vary in colour from colourless to yellow-brown, brown, or dark brown. paraphyses are simple or sparingly branched in the uppermost part, with thickened apices often capped by a brown-pigmented layer. The asci are clavate, typically with 8 spores (but sometimes as few as 2 or as many as 16) and a well-developed amyloid tholus, a paler conical axial mass, and an ocular chamber.[2]

Ascospores in the Physiaceae family have a single septum, olive to brown in colour, and ellipsoidal in shape, often displaying uneven wall thickenings. The conidiomata are pycnidial, either immersed or superficial. Conidia can be formed acrogenously or pleurogenously, and they can be ellipsoidal, bacilliform, fusiform, or filiform.[2]

Genera

This is a list of the genera contained within the Physciaceae, based on a 2020 review and summary of ascomycete classification;

taxonomic authority
, year of publication, and the number of species:

The genus Culbersonia, previously classified in the Physciaceae due to its morphological features, has been shown with molecular phylogenetics to belong to the Caliciaceae.[13]

References

  1. S2CID 90258634
    .
  2. ^
    ISBN 978-0-643-09665-3
    .
  3. hdl:10481/61998
    .
  4. ^ Körber, Gustav Wihlem (1848). Grundriss der Kryptogamen-Kunde [Foundations of Cryptogamic Knowledge]. Breslau: Ed. Trewendt. p. 87.
  5. JSTOR 4135618
    .
  6. doi:10.1556/abot.56.2014.3-4.12
    .
  7. ^
    S2CID 239503884
    .
  8. ^
    doi:10.11646/phytotaxa.235.1.1
    .
  9. ^ Moberg, R. (1977). "The lichen genus Physcia and allied genera in Fennoscandia". Symbolae Botanicae Upsalienses. 22 (1): 1–108 [29].
  10. ^ von Schreber, J.C.D. (1791). Genera Plantarum (in Latin) (8th ed.).
  11. JSTOR 3793382
    .
  12. ^ Poelt, J. (1965). "Zur Systematik der Flechtenfamilie Physciaceae". Nova Hedwigia (in German). 9: 21–32.
  13. S2CID 150264979
    .
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