Arthoniales

order of fungi Arthoniales (Arthoniales) is an order comprising closely related families of organisms. It contains 5 families with 45 known species. This includes the family groups Arthoniaceae, Chrysotrichaceae, Lecanographaceae, Opegraphaceae, and Roccellaceae. Among its members, 18 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Arthoniomycetes (Arthoniomycetes).