Fig. 1

Teratorn-like viruses are widely distributed in teleost fish genomes (a) Result of a tblastn search for 13 herpesvirus core genes of medaka Teratorn against publicly available genome data of teleost fish species. Species that appear to contain Teratorn-like virus (> 8 of the 13 herpesvirus core genes; E-value < 10^− 3) are highlighted in blue. The phylogenetic tree was constructed by Bayesian inference, based on the concatenated nucleotide sequence of 17 host genes (Betancur-R. R. et al., 2013 [39]). Species in which Teratorn-like viruses are adjacent to a piggyBac-like transposase gene are marked by magenta squares (solid, fusion for all copies; outlined, co-localization for only some of the copies). b Maximum-likelihood tree based on the concatenated amino acid sequences of five herpesvirus genes (major capsid protein, capsid triplex protein, DNA helicase, DNA polymerase and DNA packaging terminase) from Teratorn-like viruses in teleosts and exogenous alloherpesvirus species. Teratorn-like viruses are depicted in blue. Elements that harbor a piggyBac-like transposase gene are marked by magenta squares. For the designated numbers on the right (1, 2, 3), see Fig. 4c and main text. The scale bars represent the number of substitutions per site