Figure 1.

Strict consensus tree of the most-parsimonious trees, with a tree length of 4409, of the combined dataset (18S and 28S rDNA). The tree is rooted using the Stenetriidae as the outgroup. The numbers above the internal branches are decay indices and those below indicate bootstrap values, which are only given if they are above 50%. Species families are indicated by bold bars. The blue taxon names and branches indicate eye-bearing shallow-water species and their putative ancestral lineages, and the black taxon names and branches represent blind deep-sea species.