sp. nov. isolated from a fermentation system processing bovine manure.

Strain MS2379 was isolated from a pasteurized solution sample from a predominantly anaerobic fermentation system processing bovine manure in Pilot Point, Texas. Phylogenetic analyses based on both 16S rRNA gene and gene sequences showed that MS2379 was most closely related to (DSM 36) (DSM 13815) (DSM 8320) yet DNA-DNA relatedness through DNA-DNA hybridization revealed only 22.6, 32.0 and 24.7 % relatedness to these three species respectively. Rod-shaped cells of strain MS2379 are Gram-stain variable with sub-terminal, ellipsoidal, deforming endospores. The peptidoglycan contains -diaminopimelic acid (mDAP) and the predominant fatty acids are anteiso-C (61.9 %) and anteiso-C (11.6 %), confirming that strain MS2379 has diagnostic features of other species. The G+C content of MS2379 is 45.9 mol%. Fermentation of glucose yields acid and gas end-products. The polar lipids found were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and glycolipids, but also included some unidentified lipids, aminolipids, aminoglycolipid, and phosphatidylmethylethanolamine. The growth range of MS2379 was observed from 10-45 °C with optimal growth temperature at 30 °C. Growth was observed between pH 6-10 and up to 3 % NaCl. Unlike the most closely related species, strain MS2379 was negative in the Voges-Proskauer reaction. Nucleic acid, chemotaxonomic and biochemical features support the distinctiveness of strain MS2379. Thus, strain MS2379 represents a novel species of the genus for which the name sp. nov. is proposed with the type strain MS2379 (=DSM 107750=ATCC TSD-165).