Fig. 2
From: Evolutionary history of LTR-retrotransposons among 20 Drosophila species
Maximum likelihood phylogenetic tree based on the polyprotein amino acid sequences of BEL/Pao elements. Only bootstrap values greater than 50% (red dots) and greater than 70% (black dot) are indicated. The tree has been rooted by the COPIA element from D. melanogaster. The names of the species are abbreviated as follows: DAn, D. ananassae; DBi, D. biarmipes; DBp, D. bipectina; DEl, D. elegans; DEre, D. erecta (in yellow); DEu/Deu, D. eugracilis; DFi, D. ficusphila; DGri, D. grimshawi; DKi, D. kikkawai; DMel, D. melanogaster (in red); DMir, D. miranda; DMoj/Dmoj/Dmo/DM, D. mojavensis; DPer/Dpe/DP, D. persimilis; DPse/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, D. yakuba (in pink). Four sequences from other insects are included. Yellow stars represent cases of confirmed horizontal transfers (see details in Additional file 3: Figure S1b)