Fig. 6

Phylogenetic relationships of Steamer retrotransposons and their close groups. This tree is based on Neighbor-Joining analysis [33] of RT/RNaseH domain amino acid sequences. Node statistical support values come from non-parametric bootstrapping using 100 replicates and only those > 75% are shown. The three C-clade branches are indicated in color. Sequences from Lottia gigantea (LG), Pinctada fucata (PF) and Crassostrea gigas (CG) are included as known references of C9 groups [32], and SURL elements included as outgroup. Sequences obtained from TBLASTN searches are labelled by their accession number. For Steamer elements members of different taxa are color coded as shown. Givri: Gigantidas vrijenhoeki; Bapla: Bathymodiolus platifrons; Mygal: Mytilus galloprovincialis; Mycor: Mytilus coruscus; Mophi: Modiolus philippinarum; Lifor: Limnoperna fortunei; Myedu: Mytilus edulis; Anbro: Anadara broughtonii; Memer: Mercenaria mercenaria; Drros: Dreissena rostriformis; Cysin: Cyclina sinensis; Ruphi: Ruditapes philippinarum; Pemax: Pecten maximus; Cravi: Crassostrea virginica; Cragi: Crassostrea gigas; Saglo: Saccostrea glomerata