Some literature is available on cospeciation and on reconstructing the phyl
ogenetic relationships of retroelements, but relatively little consideratio
n has been given to whether there is cospeciation between retroelements and
their hosts. Here we address this problem in detail. We conclude that ther
e is no significant evidence for cospeciation between retroelements and the
ir hosts. This conclusion was reached by noting that the branching order of
the two phylogenies was no more similar than would be expected by chance.