Calvitimela

Calvitimela is a fungal genus in the family Tephromelataceae, comprising 11 species of lichen. These lichens grow tightly attached to rocks, appearing as thin, crust-like layers on their surface. They are primarily found in alpine and arctic regions around the world. Calvitimela species are characterised by their areolate (segmented) thallus and black, shiny, convex apothecia (fruiting bodies). The genus currently includes eleven recognised species, though recent genetic studies have revealed unexpected diversity within this group. Calvitimela lichens are known for their varied secondary metabolites, which can sometimes aid in species identification. However, the taxonomy of the genus remains complex and challenging, with ongoing research uncovering new information about their relationships, distribution, and evolution. These lichens play important ecological roles in their harsh mountain and polar habitats, where they are often among the few organisms able to thrive.