Figure 1. Relationships of nematode species harbouring Wolbachia symbionts.

A phylogenetic cartoon showing the relationships of the nematode species discussed in this work [23]. To the left, the systematic structure of the class Chromadoria is given, and the three major suborders within Rhabditida are highlighted. Lifecycle strategies of the groups are indicated. The fine-scale relationships of species discussed in the text are given to the right. The presence of live Wolbachia infection (+: yes, −: no), evidence of laterally-transferred Wolbachia sequences in the nuclear genome (+: yes, −: no, ?: unknown), and the availability of complete genome sequences (+: yes, −: no, ±: partial genome sequence) for each of the species are indicated.