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Concept
Calvitimela
Résumé
Calvitimela is a lichen genus in the family Tephromelataceae (Lecanorales, Lecanoromycetes). Members of the family Tephromelataceae are crustose lichens with green photobionts and lecideine or lecanorine apothecia. The species in Calvitimela have lecideine apothecia, are saxicolous and are primarily found in alpine to arctic regions.
Calvitimela currently includes ten species:
Calvitimela aglaea (Sommerf.) Hafellner
Calvitimela armeniaca (DC.) Hafellner (type species)
Calvitimela austrochilensis Fryday
Calvitimela cuprea Haugan & Timdal
Calvitimela livida Haugan & Timdal
Calvitimela melaleuca (Sommerf.) R. Sant
Calvitimela perlata (Haugan & Timdal) R. Sant
Calvitimela septentrionalis (Hertel & Rambold) McCune
Calvitimela talayana (Haugan & Timdal) M.P. Andreev
Calvitimela uniseptata G. Thor
The taxonomic history of Calvitimela is long and relatively complex. In the early days, the species now belonging to Calvitimela were placed in the classical genus Lecidea Ach., e.g. by Fries (1874; as Lecidea strips L. armeniacae). and Magnusson (1931; as “Lecidea armeniaca- und elata-Gruppe”) In the 1980s, several taxonomists revised large groups of lichens in Lecanora and Lecidea. First, the generic name Tephromela was resurrected, and the new monotypic family Tephromelataceae described. Then, a group from Lecidea was moved into the genus Tephromela M. Choisy. This led to species with both lecanorine and lecideine apothecia being present in the same genus. Finally, the genus Calvitimela was erected for species with lecideine apothecia previously placed in Tephromela. Tephromelataceae consists of the Tephromela, Calvitimela, Mycoblastus Norman and Violella T. Sprib, and together these four genera constitute a well-supported monophyletic group.
The species of Calvitimela are crustose lichens. Their thallus are areolate and their apothecia lecideine. The apothecia are convex, black and shiny. Apothecia are rare or entirely absent in some sorediate species e.g. C. cuprea, C. livida and C. talayana.
Source officielle
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