Figure 3

Phylogenetic analysis (results of NONA with Isoperla as outgroup). a, Strict consensus tree from Table 2 by NONA (Topology of strict consensus tree by PAUP is same to NONA, see Additional file 1, Fig S1); b, Strict consensus tree from Table 3 by NONA (Topology of strict consensus tree by PAUP is slightly different to NONA, see Additional file 2, Fig S2); c, One most parsimonious tree from Table 3 by NONA. Other results by NONA are same (see Additional file 3, Fig S3).