Fig. 4

Maximum likelihood phylogenetic tree based on the polyprotein amino acid sequences of Ty3/Gypsy elements from the group “MICROPIA/SACCO”. Only bootstrap values greater than 50% (red dots) and greater than 70% (black dot) are indicated. The tree has been rooted by the Batumi element from D. melanogaster and we also added elements from the two other groups of Ty3/Gypsy (Tirant from D. melanogaster and Osvaldo from D. buzzati). The names of the species are abbreviated as follows: DAn, D. ananassae; DBi, D. biarmipes; DBp, D. bipectina; Dbuz, D. buzzatti; DEl, D. elegans; DEre, D. erecta; DEu/Deu, D. eugracilis; DFi, D. ficusphila; DMel, D. melanogaster (in red); Dmoj, D. mojavensis; DPer/DP, D. persimilis; Dpse, D. pseudoobscura; DRh, D. rhopaloa; DSe, D. sechellia (in green); DSi, D. simulans (in blue); DTa, D. takahashi; DVir/DV, D. virilis; DWil, D. willistoni; DYa/Dya, D. yakuba (in pink). Two sequences from other insects are included. Yellow stars represent cases of confirmed horizontal transfers (see details in Additional file 3: Figure S1d)