Characterization of Glomerella acutata, the teleomorph of Colletotrichum acutatum

The association between the anamorph Colletotrichum acutatum and a new tele omorph, Glomerella acutata, was documented. Fertile perithecia were produce d in a series of crosses between self-sterile monoconidial strains of C. ac utatum, demonstrating a preciously undescribed teleomorph directly associat ed with the anamorph originally described by J. H. Simmonds in 1965. Strain s capable of crossing included the C. acutatum type specimen, originally is olated from papaya (Carica papaya) in Australia by Simmonds, and other arch ived and contemporary strains from several hosts from the United States, Au stralia and New Zealand. The resulting teleomorph, Glomerella acutata, was described and illustrated as a ne tv species which can be distinguished fro m other taxa by a combination of features of the anamorph, the teleomorph, and mitochondrial and nuclear DNA. Perithecia of G. acutata were black-brow n, predominantly ampulliform, 125 X 312 mum (mean 183 mum) diam, ostiolate and periphysate. Asci were narrowly clavate and bore up to eight oblong to ellipsoidal ascospores which measured 8.5-(15.7)-25.1 X 3.1-(5.8)-8.1 mum.