Thielavia jinsin fungi ne a cikin dangin Ceratocystidaceae. Jinsunan da ke cikin wannan nau'in ana kiransu da sunan "tushen rot fungi" kuma kwayoyin cuta ne da ke haifar da cututtuka a cikin ƙasa waɗanda ke haifar da cututtuka a cikin nau'o'in tsire-tsire, ciki har da hatsi, legumes, da tsire-tsire na ado. An ba wa wannan nau'in sunan sunan Masanin ilimin kimiyya na Jamus Hans Thiel (1889-1962).