VIRUS-TRANSPOSONS. “Some groups of polintoviruses have lost capsid protein genes and apparently became bona fide transposons, for which the name polintons can be retained. Polintoviruses are the second major group of eukaryotic dsDNA viruses, after the “Megavirales,” that is represented in widely diverse unicellular eukaryotes along with many animals.”
http://onlinelibrary.wiley.com/doi/10.1111/nyas.12728/full