E. Bigliardi et al., INTERACTIONS BETWEEN PROKARYOTIC AND EUKARYOTIC CELLS IN SPONGE ENDOCYTOBIOSIS, Endocytobiosis and cell research, 9(2-3), 1993, pp. 215-221
A study of serial thin sections and freeze-fracture replicas of Petros
ia ficiformis (Poiret) (Demospongia) mesohyl revealed specialized cell
s (bacteriocytes) housing symbionts within large vacuoles. Adhesion si
tes between the symbiont envelope and vacuolar membrane are compared w
ith similar differentiations previously described in Insect endocytobi
osis.