(Q2239)

Grim, J.N. (1993). Endonuclear symbionts within a symbiont - the surgeonfish intestinal symbiont, Balantidium jocularum (Ciliophora) is host to a Gram-positive macronuclear inhabiting bacterium. Endocytobiosis and Cell Res. 9 (2-3) : 209-214.