Figure 2 of M.L. Blaxter

"Caenorhabditis elegans is a nematode"

Phylogram depicting the relationships between different nematodes, which is summarised in Figure 2. The alignment used to derive this tree is given here. To the right of each taxon is an icon illustrating its trophic ecology. The higher taxonomic groupings from which the taxa derive are given on the far right, and the clades (as in Blaxter et al. 1998) are numbered with roman numerals, except for the paraphyletic Chromadorida (C). The nematomorph used as an outgroup was Chordodes morgani.