ɪts dᵻvˈɪʒən ˌɪntʊ sˈʌbklæsᵻz hæv ɹᵻsˈiːvd stɹˈɔŋ səpˈoːɹt baɪ ðə məlˈɛkjʊlɚ dˈeɪɾə, bˌʌt ðɪ ˌoʊvɚɹˈɔːl mˈɑːnoʊfili ʌv lˈiəɾɪˌɑːmaɪsˌiːts ɪz dˈuːbɪəs.
Its division into subclasses have received strong support by the molecular data, but the overall monophyly of Leotiomycetes is dubious.