Fig. 7: Electron micrographs of freeze-etched, Platinum-Carbon shadowed co-culture cells, containing Ca. Scheffleriplasma hospitalis and Ca. Micrarchaeum harzensis.

Ca. Micrarchaeum harzensis cells, displaying an S-layer on their surface, were observed (a) in physical contact with Ca. Scheffleriplasma hospitalis cells, as well as (b) free living and (c) undergoing cell division. Scale bars equal 200 nm. The freeze-etching experiment was repeated once, each time micrographs showing more than 100 cells were analysed.