Bitunicate asci occur only in pseudothecia and are found only in the classes Dothideomycetes and Chaetothyriomycetes (which were formerly united in the old class Loculoascomycetes).
Aski Bitunicate hanya terjadi pada pseudothecia dan ditemukan hanya dalam kelas Dothideomycetes dan Chaetothyriomycetes (yang dulunya bersatu di kelas Loculoascomycetes lama).