One beige pigmented, Gram-staining negative, rod-shaped bacterium, strain E3/4T, was isolated from a Zebra fish, Danio rerio. Phylogenetic analysis based on nearly full-length 16S rRNA gene sequences showed that the isolate shared 98.5% 16S rRNA gene sequence identity to the type strain of Undibacterium macrobrachii and 97.8% to the type strain of Undibacterium seohonense. Lower 16S rRNA gene sequence similarities (< 97.0%) could be found in comparison to all other Undibacterium species. DNA-DNA hybridisation (DDH) with Undibacterium macrobrachii LMG 26891T showed low < 35%. The main cellular fatty acids of the strain was summed feature 3 fatty acids (C16:1ω7c/ C16:1ω8c), C10:0 3-OH and C16:0. The polyamine pattern of strain E3/4T contained predominantly putrescine and 2-hydroxyputrescine. The major quinone was ubiquinone Q-8. Major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Based on phylogenetic, chemotaxonomic, genomic and phenotypic analyses we propose a new species of the genus Undibacterium, Undibacterium danionis with strain E3/4T (= DSM 102221T = CCM 8677T) as type strain.

One slightly beige-white pigmented, Gram-stain-negative, rod-shaped bacterium, strain I-STPP5bT, was isolated from the trachea of a Gentoo penguin chick individual (Pygoscelin papua) investigated in Fildes Bay, Chilean Antarctic (62° 12′ S, 58° 57′ W). I-STPP5bT consists of a 3.4 Mb chromosome with a DNA G+C content of 44.4 mol%. Of the 3056 predicted genes, 1206 were annotated as hypothetical proteins and 51 were tRNAs. Phylogenetic analysis based on nearly full-length 16S rRNA gene sequences showed that the isolate shared a 16S rRNA gene sequence identity to the type strains of Psychrobacter phenylpyruvicus (98.8 %), Psychrobacter arenosus and Psychrobacter pasteurii (both 98.3 %), Psychrobacter piechaudii (98.2 %) and Psychrobacter sanguinis (98.1 %), but 16S rRNA gene sequence similarities to all other Psychrobacter species were ≤98.0 %. Partial gyrB nucleotide and amino acid sequence similarities among strain STPP5bT and the next related type strains were all below 81.8 and 92.9%, respectively. DNA–DNA hybridisation (DDH) with P. phenylpyruvicus LMG 5372T, P. arenosus DSM 15389T and P. sanguinis DSM 23635T also showed low values (all below 30 %). The main cellular fatty acids of the strain were C18 : 1ω9c and C16 : 1ω7c and/or C16 : 1ω6c. Based on phylogenetic, chemotaxonomic, genomic and phenotypic analyses we propose a new species of the genus Psychrobacter, with the name Psychrobacter pygoscelis sp. nov. and strain I-STPP5bT (=CIP 111410T= CCM 8799T=LMG 30301T) as type strain.