The publication “The genome of Onchocerca volvulus, agent of river blindness” by James A Cotton, et. al describes in detail the O. volvulus genome available at WormBase and ParaSite.
It includes a section on gene family evolution of O. volvulus and relatives showing the phylogeny of 9 selected nematodes covering 3 clades. In addition it describes potential drug targets based on their predicted metabolic pathway in relation to their druggability by known compounds, which could be expanded to other organisms.
This paper can be also cited as reference for the genome assemblies.