Evolution of mitochondrial eukaryotes by symbiotic proteobacterial-non-mitochondrial eukaryote hybridization
Rickettsia-like intracellular bacterial parasites/symbionts associated with postmating isolation and speciation of the mosquito Culex pipiens, Nasonia
vitripennis and N. giraulti.
Plant speciation through hybidization/symbiosis of 2 prior independent plant species.