Problems and prospects in the systematics of the Ascomycotina

摘要: The classification of the Ascomycotina remains one major problems in systematic mycology. A survey various systems proposed over last five decades is presented identifying their key aspects. table including outlines 20 provided. Constraints to developing a generally acceptable system are identified as arising from size group, its geological age, assumption phylogenetic concepts, data availability, convergence, delimitation genera, and taxa remaining be discovered. Progress towards an must pay due regard users taxonomy have strong elements stability. Data collection could approached by concerted efforts groups specialists tackling particular orders turn. It seems most appropriate progress building up hierarchy maximum information content groups, concentrating on delimiting monophyletic units ranks order family, restricting hypothetical overall specialist debate rather than recommending them for general use.