Walkaminomyces Crous & Carnegie, gen. nov.
MycoBank number: MB832059; Index Fungorum number: IF 832059; Facesoffungi number: FoF 11226
Etymology: Named after the town where it was collected in Australia, Walkamin.
Leaf spots amphigenous, irregular, small (5 mm diam) to large spreading blights with irregular margins. Ascomata pseudothecial, amphigenous, immersed, becoming erumpent, black, globose. Asci aparaphysate, fasciculate, bitunicate, subsessile, obclavate to ellipsoidal, straight to incurved, 8-spored. Ascospores multiseriate, hyaline, guttulate, straight, fusoid-ellipsoidal with obtuse ends, medianly 1-septate.
Type species: Walkaminomyces medusae (Carnegie & G.S. Pegg) Crous & Carnegie
Notes: Based on DNA phylogenetic data, Mycosphaerella medusae represents a new genus in the Mycosphaerellaceae, for which the name Walkaminomyces is introduced. Walkaminomyces is presently monotypic, known from a single species collected on leaves of E. alba in Queensland, where it was associated with prominent leaf spotting. This taxon is characterised by having a distinct germination pattern, germinating with 4– 6 snake-like germ tubes per ascospore (Carnegie et al. 2011).
Species