# Occallatibacter bavaricus sp. nov., a new representative of the Acidobacteriota isolated from fen soils, reclassification of Terracidiphilus gabretensis as Occallatibacter gabretensis comb. nov. and emended description of the genus Occallatibacter

## TL;DR

A new soil bacterium, Occallatibacter bavaricus, was discovered in Germany and reclassified another species into the same genus.

## Contribution

The paper introduces a new bacterial species and reclassifies an existing one based on genetic and phenotypic data.

## Key findings

- Occallatibacter bavaricus was isolated from fen soil and has unique growth and lipid characteristics.
- Terracidiphilus gabretensis was reclassified as Occallatibacter gabretensis based on phylogenetic and chemotaxonomic analysis.
- The new species shares 96.1–96.7% 16S rRNA gene sequence similarity with related acidobacterial strains.

## Abstract

The acidobacterial strain JP12T affiliated with the Terriglobales has been isolated from fen soil sampled at Schlöppnerbrunnen II near Bayreuth, Germany. The strain was Gram-stain-negative, non-motile, displayed non-spore-forming rods that divide by binary fission and segregate exopolysaccharide-like structures. JP12T grew at temperatures of 4–40 °C (best between 24 and 30 °C), at pH values of 3.7–6.0 (best between 4.1 and 5.6) and at NaCl concentrations of 0–0.5% (best 0.25%, w/v).

MK-8 was identified as the major respiratory quinone. The major fatty acids of the strain JP12T were iso-C15:0, C16:0, iso-C17:1
ω7c, iso-C17:0 and iso-diabolic acid. Phosphatidylglycerol, phosphatidylethanolamine and ornithine-containing lipids were the major polar lipids. Lysophosphatidylethanolamine, phosphatidylinositol, diphosphatidylglycerol and high-mass intact polar lipids occurred in small amounts. The G+C content of the strain JP12T was 56.4 mol%. 16S rRNA gene sequence similarity values of 96.1–96.7% placed the strain JP12T in the vicinity of the type strains of Occallatibacter savannae A2-1cT, Telmatobacter bradus TPB6017T, Occallatibacter riparius 277T and Terracidiphilus gabretensis S55T, respectively. Based on the phenotypic, phylogenetic and chemotaxonomic data, we propose the new species Occallatibacter bavaricus sp. nov. (type strain JP12T=DSM 110680T=CECT 30267T) within the acidobacterial order Terriglobales. We also propose the reclassification of Terracidiphilus gabretensis as Occallatibacter gabretensis comb. nov.