FIG 6.

Cladograms of Xenorhabdus and Steinernema color coded according to Xenorhabdus DUF560 class. (A and B) Cophylogeny of nematode species and their colonizing bacteria across the Steinernema genus (A) or with a focus on specific clades (B). Numbers on branches indicate bootstrap support values. Bootstrap values below 60% were contracted. Lines connecting the phylogenies indicate mutualist pairs. Roman numerals highlight the five Steinernema clades described in reference 41. Colored overlays indicate the DUF560 class of a given bacterium or a given nematode’s symbiont as follows: class A (light green), class B (light blue), class C (dark green), class D (red), class E (orange), and class F (purple).