A novel bacterium, designated strain E9, was isolated from pine forest soil of Kyonggi University (Suwon, Republic of Korea). Cells were facultatively anaerobic, Gram-staining-negative, catalase-negative, oxidase-positive, non-motile, non-spore-forming, rod-shaped and straw coloured. Prosthecae were absent. Glucose was fermented. The strain grew in the pH range of 5.0-10.0 (optimum, 6.5-8.5) and at 45 °C (optimum, 28-32 °C). E9 was sensitive to NaCl at low concentration and tolerated only 0.2 % NaCl (w/v). A phylogenetic analysis based on 16S rRNA gene sequences revealed that E9 formed a lineage within the phylum Proteobacteria that was distinct from various members of the order Rhizobiales, including Ancalomicrobium adetum DSM 4722 (94.76 % sequence similarity), 'Nitratireductor lucknowense' IITR-21 (92.72 %), Prosthecomicrobium hirschii 16 (92.66 %) and Kaistia soli DSM 19436 (92.53 %). The predominant isoprenoid quinone was Q-10. The major polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and phosphatidyl-N-methylethanolamine. Major cellular fatty acids were summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c), summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), and C16 : 0. The DNA G+C content of the type strain was 68.4 mol%. Polyphasic characterization indicated that strain E9 represented a novel species in a novel genus within a novel family, for which the name Pinisolibacter ravus gen. nov., sp. nov. is proposed. The type strain of Pinisolibacter ravus is E9 (=KEMB 9005-534=KACC 19120=NBRC 112686). A formal allocation of the genus Ancalomicrobium to the family Ancalomicrobiaceae fam. nov. is also proposed.