Jinshanibacter, a new genus of Budviciaceae: identification of Jinshanibacter zhutongyuii sp. nov. and Jinshanibacter xujianqingii sp. nov. isolated from cloacal content of snow finch (Montifringilla taczanowskii)

Description of Limnobaculum eriocheiris sp. nov., an intestinal bacterium of Eriocheir sinensis, and reclassification of the genera Jinshanibacter and Insectihabitans as Limnobaculum

A Gram-stain-negative, aerobic, non-motile and rod-shaped strain, designated LJY008^T, was isolated from the intestinal of Eriocheir sinensis in Pukou base of Jiangsu Institute of Freshwater Fisheries. Strain LJY008^T could grow at 4-37 ℃ (optimum, 30 ℃), pH 6.0-8.0 (optimum, pH 7.0), and with 1.0-6.0% NaCl (w/v; optimum, 1.0%). Strain LJY008^T shared highest 16S rRNA gene sequence similarity with Jinshanibacter zhutongyuii CF-458^T (99.3%), followed by J. allomyrinae BWR-B9^T (99.2%), Insectihabitans xujianqingii CF-1111^T (97.3%), and Limnobaculum parvum HYN0051^T (96.7%). The major polar lipids include phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. The only respiratory quinone was Q8, and the main fatty acids (> 10%) were C_16:0, summed feature 3 (C_16:1ω7c/C_16:1ω6c), summed feature 8 (C_18:1ω7c), and C_14:0. The genome-based phylogenies showed that strain LJY008^T was closely associated with members of the genus Jinshanibacter, Insectihabitans, and Limnobaculum. The average nucleotide identities and average amino acid identities (AAI) among strain LJY008^T and closely related neighbours were all below 95%, and the digital DNA-DNA hybridization values among them were all below 36%. The genomic DNA G + C content of strain LJY008^T was 46.1%. Based on the phenotypic, phylogenetic, biochemical and chemotaxonomic analysis, strain LJY008^T represents a novel species of the genus Limnobaculum, for which the name Limnobaculum eriocheiris sp. nov. is proposed. The type strain is LJY008^T (= JCM 34675^T = GDMCC 1.2436^T = MCCC 1K06016^T). In addition, the genera Jinshanibacter and Insectihabitans were reclassified as Limnobaculum, because there was no significant genome-scale divergence or diagnosable difference on phenotypic and chemotaxonomic traits, such as strains of Jinshanibacter and Insectihabitans sharing AAI values of 93.88-94.96%.

Update on Novel Taxa and Revised Taxonomic Status of Bacteria Isolated from Nondomestic Animals Described in 2018 to 2021

Revisions and new additions to bacterial taxonomy can have a significant widespread impact on clinical practice, infectious disease epidemiology, veterinary microbiology laboratory operations, and wildlife conservation efforts. The expansion of genome sequencing technologies has revolutionized our knowledge of the microbiota of humans, animals, and insects. Here, we address novel taxonomy and nomenclature revisions of veterinary significance that impact bacteria isolated from nondomestic wildlife, with emphasis being placed on bacteria that are associated with disease in their hosts or were isolated from host animal species that are culturally significant, are a target of conservation efforts, or serve as reservoirs for human pathogens.

Jinshanibacter allomyrinae sp. nov., isolated from larvae of Allomyrina dichotoma, proposal of Insectihabitans xujianqingii gen. nov., comb. nov. and emended descriptions of the genera Jinshanibacter, Limnobaculum and Pragia

Taxonomic positions of four Gram-negative bacterial strains, which were isolated from larvae of two insects in Jeju, Republic of Korea, were determined by a polyphasic approach. Strains CWB-B4, CWB-B41 and CWB-B43 were recovered from larvae of Protaetia brevitarsis seulensis, whereas strain BWR-B9^T was from larvae of Allomyrina dichotoma. All the isolates grew at 10-37 °C, at pH 5.0-9.0 and in the presence of 4 % (w/v) NaCl. The 16S rRNA gene phylogeny showed that the four isolates formed two distinct sublines within the order Enterobacteriales and closely associated with members of the genus Jinshanibacter. The first group represented by strain CWB-B4 formed a tight cluster with Jinshanibacter xujianqingii CF-1111^T (99.3 % sequence similarity), whereas strain BWR-B9^T was most closely related to Jinshanibacter zhutongyuii CF-458^T (99.5 % sequence similarity). The 92 core gene analysis showed that the isolates belonged to the family Budviciaceae and supported the clustering shown in 16S rRNA gene phylogeny. The genomic DNA G+C content of the isolates was 45.2 mol%. A combination of overall genomic relatedness and phenotypic distinctness supported that three isolates from Protaetia brevitarsis seulensis are different strains of Jinshanibacter xujianqingii, whereas one isolate from Allomyrina dichotoma represents a new species of the genus Jinshanibacter. On the basis of results obtained here, Jinshanibacter allomyrinae sp. nov. (type strain BWR-B9^T=KACC 22153^T=NBRC 114879^T) and Insectihabitans xujianqingii gen. nov., comb. nov. are proposed, with the emended descriptions of the genera Jinshanibacter, Limnobaculum and Pragia.