Collections of Moelleriella zhongdongii were made at the La Selva Biological Station in Costa Rica. Fresh collections were examined to evaluate developmental stages. Isolations were made from single part-ascospores and Aschersonia conidia. Moelleriella zhongdongii produces perithecia with evanescent asci and part-ascospores, and both hirsutella-like and Aschersonia synanamorphs. Both anamorphs were produced in pure cultures under cultural conditions optimal to induce the respective anamorphs. Low-nutrient conditions favoured production of the hirsutella-like anamorph while high-nutrient conditions favoured development of the Aschersonia anamorph. The teleomorph developed on leaves of host plants but were not produced in vitro.