candidatus caballeronia rigidae candidatus caballeronia rigidae "candidatus caballeronia rigidae" is a bacterium from the genus caballeronia and the family burkholderiaceae. candidatus burkholderia rigidae is an endosymbiont. "candidatus caballeronia rigidae" scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: burkholderiaceae genus: caballeronia species: "ca. c. rigidae" binomial name "candidatus caballeronia rigidae" synonyms "candidatus burkholderia rigidae" lemaire et al. 2012