Cryptothecia

Cryptothecia
Cryptothecia sp. growing on a tree in Chaco Province, northern Argentina.
Scientific classification
Kingdom: Fungi
Division: Ascomycota
Class: Arthoniomycetes
Order: Arthoniales
Family: Arthoniaceae
Genus: Cryptothecia
Stirt.
Type species
Cryptothecia subnidulans
Stirt.
Species

C. atropunctata
C. candida
C. eungellae
C. exilis
C. inexspectata
C. rubrocincta
C. rubrocinctoides
C. scripta
...

Cryptothecia is a genus of white to greenish crustose lichens that grow on bark, wood, or leaves. in tropical or subtropical areas worldwide.[1] It has a conspicuous prothallus that develops around its periphery which can be bright red in some species, hence the common name wreath lichen.[2] The main vegetative body (thallus) lacks a cortex (ecorticate and is often immersed in the substrate or byssoid (whispy, like teased wool).[1] The medulla is white, well defined, and often peppered with calcium oxalate crystals.[1] Ascomata are not well defined, being cushions of soft white mycelium immersed in the medullary tissue, hence the name from the Greek “krypto” = “to conceal” and “theke” = “a container or sheath”.[1] There are about 45 described species in the genus according to one source,[1] and 75 species according to another.[3] The genus is in the Arthoniaceae family.[4] It contains Trentepohlia, a green alga, as its photobiont ).

Two species have been described in North America.[2] At least one species, Cryptothecia rubrocincta, has been used in Brazil as a source of dye.[5]

References

  1. 1 2 3 4 5 CRYPTOTHECIA, Flora of Australia volume 57, John A. Elix, 2009
  2. 1 2 Brodo, I. M., S. D. Sharnoff, and S. Sharnoff. 2001. Lichens of North America. Yale University Press: New Haven.
  3. ↑ Kirk MP, Cannon PF, Minter DW, Stalpers JA (2008). Dictionary of the Fungi (10th ed.). Wallingford, UK: CAB International. p. 181. ISBN 0-85199-826-7.
  4. ↑ Lumbsch TH, Huhndorf SM (December 2007). "Outline of Ascomycota – 2007". Myconet. Chicago, USA: The Field Museum, Department of Botany. 13: 1–58. Archived from the original on 2009-03-18.
  5. ↑ Mors, WB. 1966. Useful Plants of Brazil. Holden-Day, Inc., San Francisco. Page 57.

Further reading

  • U.Makhija & P.G.Patwardhan, A contribution towards a monograph of the lichen genus Cryptothecia (family Arthoniaceae), Current Res. Pl. Sci. 1994: 57–72 (1994)
  • G.Thor, The genus Cryptothecia in Australia and New Zealand and the circumscription of the genus, Symb. Bot. Upsal. 32(1): 267–289 (1997)
  • R.Lücking, G.Thor, A.Aptroot, K.Kalb & J.A.Elix, The Cryptothecia candida complex revisited, Lichenologist 38: 235–240 (2006).


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.