A new gene rearrangement “trnM-trnI-trnQ” was identified in P. detersus that is the first representative of Polyneoptera.
Duplicated CRs with 492 bp identical fragments were found in R. obscura.
One conserved stem-loop located in the duplicated CRs that might be linked with replication initiation.
The species in Ruidocollaris, Sinochlora and their closely related genera, may have abundant rearrangement events.