Phylogenetic analysis of group I introns of the LSU rDNA genes from entomopathogenic fungi. The MP tree was generated by parsimony analysis after heuristic searching (TBR option). Bootstrap full heuristic analysis with bootstrap intervals from 1000 replications and nodes supported in >50% of bootstrap replicates was generated using the PAUP 4.0 program. The branch lengths are proportional to the number of changes. Eleven different intron sequence types identified from 26 Metarhizium anisopliae isolates were aligned with 21 representative intron sequences from Metarhizium anisopliae (Ma), Beauveria bassiana (Bb), Cordyceps profilica (Cp) and Cordyceps sp. (Csp) and, and an intron sequence from Naegleria sp. (Nsp) was used as an outgroup.