The 8 (delta)Proteobacteria Bdellovibrio.Prey on other bacteria 。 Desulfovibrionales.Use S instead of O2 as final electron acceptor Myxococcales.Gliding.Cells aggregate to form myxospores• Bdellovibrio. Prey on other bacteria • Desulfovibrionales. Use S instead of O2 as final electron acceptor • Myxococcales. Gliding. Cells aggregate to form myxospores The  (delta) Proteobacteria