Leptogium

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Leptogium
Leptogium phyllocarpum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Peltigerales
Family: Collemataceae
Genus: Leptogium
(
Ach.) Gray
(1821)
Type species
Sw.
) Gray (1821)

Leptogium is a

fungi in the family Collemataceae.[1] It has about 110 species.[2] Species formerly classified under Leptogium have since been divided among the genera Leptogium, Pseudoleptogium, and Scytinium. Leptogium lichens are predominantly found on tree bark or soil, often among mosses, and sometimes on rocks in moist environments.[3]

Taxonomy

In 2013, a proposal supported by

Nomenclature Committee for Fungi as it simplifies the taxonomy and maintains historical continuity for the genus Leptogium.[5]

Description

Leptogium is characterized by its foliose, gelatinous thallus, which varies in colour from blue-grey to olive-brown or blackish. The upper and lower cortex of these lichens consists of a single layer of roughly equal-sized cells. The medulla, on the other hand, is made up of loosely intertwined hyphae intermingled with chains of photobiont cells. The upper surface of the thallus can range from smooth to wrinkled or ridged, often exhibiting a glossy appearance, while the lower surface may be smooth, web-like, or hairy, sometimes featuring small clusters of white rhizines.[3]

Leptogium species often possess

ascomata are apothecia, which can be sessile or shortly stalked and are predominantly laminal. The thalline margin may persist or become excluded, occasionally displaying a lobulate form. The true exciple is raised, cup-shaped, and mainly composed of periclinally arranged hyphae, with a colour that varies from colourless to reddish-brown. The disc of the lichen is either concave or flat.[3]

The

Lichen substances have not been detected by thin-layer chromatography in Leptogium species.[3]

Species

As of April 2023[update],

Species Fungorum (in the Catalogue of Life) accepts 84 species of Leptogium.[1]

Leptogium chloromelum
Leptogium cochleatum
Leptogium javanicum
Leptogium phyllocarpum
Leptogium saturninum

References

  1. ^ a b "Leptogium". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 19 April 2023.
  2. hdl:10481/76378
    .
  3. ^
    doi:10.34885/174. Open access icon
  4. doi:10.12705/626.23
    .
  5. doi:10.1002/tax.13099
    .
  6. ^
    doi:10.1017/s0024282913000443
    .
  7. ^
    doi:10.1017/S0024282918000269
    .
  8. doi:10.1017/s0024282983000183
    .
  9. ^ a b c d e Lindström, M. (2007). "New species in the lichen genus Leptogium (Collemataceae) from tropical South America". Bibliotheca Lichenologica. 95: 405–428.
  10. ^ a b c d e Verdon, D. (1990). "New Australasian species and records in the genus Leptogium S. Gray (lichenized Ascomycotina: Collemataceae)". Mycotaxon. 37: 413–440.
  11. ^ Marcelli, M.P.; Jungbluth, P.; Benatti, M.N.; Spielmann, A.A.; Canêz, L.S.; Cunha, I.P.R.; Martins, M.F.N. (2007). "Some new species and combinations of Brazilian lichenized fungi". In Frisch, Andreas; Lange, Ute; Staiger, Bettina (eds.). Lichenologische Nebenstunden. Contributions to lichen taxonomy and ecology in honour of Klaus Kalb. Bibliotheca Lichenologica. Vol. 96. pp. 209–228.
  12. ^
    doi:10.1639/0007-2745-116.1.015
    .
  13. doi:10.1639/0007-2745-118.1.011
    .
  14. ^
    doi:10.1017/s0024282910000332
    .
  15. ^ Wilson, F.R.M. (1893). "The lichens of Victoria. Part 1". Proceedings of the Royal Society of Victoria. 5: 141–177 [157].
  16. doi:10.1017/s0024282909990764
    .
  17. doi:10.5248/120.215
    .
  18. ^
    doi:10.5248/130.471
    .
  19. doi:10.5248/119.413
    .
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