Fig 7. Secondary structures of the three types of tRNA genes identified in the mitogenome of four Psylloidea species.

Bar “-”, Watson-Crick base pairing. Others are canonical base parings in tRNA: Plus sign “+”, a paring between G and U; Dot “•” A paring between U and U; And Hollow dot “◦”, a paring between A and G. Bases highlighted in red indicated the different structure among the four Psylloidea members.