A new genus Actinokineospora is described. It is characterized by forming chains of zoospores originating from aerial mycelium, and has type IV/A cell walls and a type PII phospholipids pattern. The major menaquinone is MK-10. No mycolic acids are present. The guanine-plus-cytosine content of the deoxyribonucleic acid is 72.0 mol%. The type strain of A. riparia is C-39162 (IFO 14541).