Blattabacterium in an obligate

Obligate

Obligate means "by necessity" and is used mainly in biology in phrases such as:* Obligate aerobe, an organism that cannot survive without oxygen* Obligate anaerobe, an organism that cannot survive in the presence of oxygen...

 mutualistic endosymbiont

Endosymbiont

An endosymbiont is any organism that lives within the body or cells of another organism, i.e. forming an endosymbiosis...

 bacterium that is believed to inhabit all species of cockroach

Cockroach

Cockroaches are insects of the order Blattaria or Blattodea, of which about 30 species out of 4,500 total are associated with human habitations...

 studied to date, with the exception of Nocticola species. B. cuenoti is traditionally considered the only species in the genus Blattabacterium, which is in turn the only genus in the family Blattabacteriaceae, although three new species have been described from different species of Cryptocercus

Cryptocercus

Cryptocercus is a genus of Dictyoptera in the family Polyphagidae, of which this genus is the only member. Species are known as wood roaches or brown-hooded cockroaches....

: B. relictus in Cryptocercus relictus, B. clevelandi in Cryptocercus clevelandi and Blattabacterium punctulatus in Cryptocercus darwini, Cryptocercus garciai

Cryptocercus garciai

Cryptocercus garciai is a species of wood roach named after American musician Jerry Garcia....

, Cryptocercus punctulatus and Cryptocercus wrighti.