identification of "a. strictum" isolates has shown that this fungus is phenotypically diverse and may vary genetically. due to phylogenetic ambiguities, an unknown proportion of the literature on "a. strictum" is based on studies of "acremonium sclerotigenum". the fungus can generally be successfully identified by the nuclear its region sequence analysis. analysis of the genes for ribosomal large subunit (lsu) and whole small subunit (ssu) also help to elucidate phylogenetic relationships, since these genes are more conserved and less subject to evolutionary changes. the species "a. strictum" is separated into three genogroups. genogroup i is represented by type strain cbs 346.70, genogroup ii by uw836 and genogroup iii by uwfp940. these genogroups were determined based on genbank entries for "a. strictum".