Wuestneia molokaiensis is newly described from Eucalyptus robusta twigs col
lected in Hawaii. Single ascospore strains produced a Harknessia anamorph a
nd microconidial state in culture. W: molakaiensis and H. molokaiensis are
compared with previously described species in these genera and described as
new. W. molokaiensis is distinguished based on its smaller ascospores with
persistent mucous sheaths, and H. molokaiensis based on its smaller ellips
oidal conidia.