The Syntrophales are an order of gram-negative Thermodesulfobacteriota.

Acetate is converted by syntrophales into acetyl-CoA, which can be used as a source of carbon and energy.

Given that genes involved in fermentation were missing, this might then be channeled into gluconeogenesis.

Langwig, M.V., De Anda, V., Dombrowski, N. et al.

Large-scale protein level comparison of Deltaproteobacteria reveals cohesive metabolic groups.