Register list for 5 new names including Chordibacter gen. nov.

Members of the family Seribacteraceae are predicted to be aerobic and heterotrophic marine bacteria dwelling in surface waters. A total of 71 MAGs belonging to this family were recovered in the 2010, 2011, 2012, 2016, 2018 and 2020 Helgoland spring blooms which fell into 6 clusters. Seribacteraceae belongs to the order Opitutales, class Verrucomicrobiae, and phylum Verrucomicrobiota (based on GTDB taxonomy). Formerly identified as family MB11C04. Two FISH probes for members of this family have been developed  (probe c17-1166 and c21-472 from Orellana et al., 2022) and previously used to describe that members of this genus are short rods (Orellana et al., 2022). The type genus is Seribacter and the corresponding type material is the metagenome-assembled genome r4, which shows 99.5% ANI to a previously described representative of the MB11C04 family (MB5 from Orellana et al., 2022).

Members of the Chordibacter genus are predicted to be aerobic and heterotrophic marine bacteria dwelling in surface waters. A total of 17 MAGs belonging to this genus were recovered in the 2011, 2012, 2016, and 2018 Helgoland spring blooms. Chordibacter  belongs to the family Seribacteraceae, formerly known as MB11C04, order Opitutales, class Verrucomicrobiae, and phylum Verrucomicrobiota. Formerly identified as genus MB11C04. A FISH probe for this family has been developed (probe c17-1166 from Orellana et al., 2022) and previously used to describe that members of this genus are short rods of length and width 0.9 and 0.8 µm respectively (Orellana et al., 2022).

Members of the Seribacter genus are predicted to be aerobic and heterotrophic marine bacteria dwelling in surface waters. A total of 45 MAGs belonging to this genus were recovered in the 2010, 2011, 2012, 2016, 2018 and 2020 Helgoland spring blooms. Seribacter belongs to the family Seribacteraceae fam. nov., order Opitutales, class Verrucomicrobiae, and phylum Verrucomicrobiota.  Formerly identified as genus MB11C04 in family MB11C04. A FISH probe for this family has been developed  (probe c21-472 from Orellana et al. 2022) and previously used to describe that members of the this genus are short rods of length and width 1.2 and 1.0 µm respectively (Orellana et al. 2022).

Orellana, L.H., Francis, T.B., Ferraro, M., Hehemann, J.-H., Fuchs, B.M., Amann, R.I. (2022) Verrucomicrobiota are specialist consumers of sulfated methyl pentoses during diatom blooms. ISME J, 630–41, Doi: 10.1038/s41396-021-01105-7.

Members of the Chordibacter genus are predicted to be aerobic and heterotrophic marine bacteria dwelling in surface waters. A total of 17 MAGs belonging to this genus were recovered in the 2011, 2012, 2016, and 2018 Helgoland spring blooms. This genome is estimated to be 92.7% complete with 2.2% redundancy. It has a GC content of 44.3% and a genome size of 2.12 Mbp. The 5S, 16S, and 23S rRNA genes were identified in the genome. Chordibacter forsetii belongs to the family MB11C04, order Opitutales, class Verrucomicrobiae, and phylum Verrucomicrobiota. Formerly identified as genus MB11C04 and species MB11C04. A FISH probe for this family has been developed (probe c17-1166 from Orellana et al., 2022) and previously used to describe that members of this genus are short rods of length and width 0.9 and 0.8 µm respectively (Orellana et al., 2022). The type species is Chordibacter forsetii and the corresponding type material is the metagenome-assembled genome ERZ814923, which shows 99.3% ANI to a previously described representative of the MB11C04 family (MB1 from Orellana et al., 2022).

Members of the Seribacter genus are predicted to be aerobic and heterotrophic marine bacteria dwelling in surface waters. A total of 45 MAGs belonging to this genus were recovered in the 2010, 2011, 2012, 2016, 2018 and 2020 Helgoland spring blooms. This genome is estimated to be 94.2% complete with 0% redundancy. It has a GC content of 42.6% and a genome size of 2.53 Mbp. The 5S, 16S, and 23S rRNA genes were identified in the genome (Table S8). Seribacter sulfatis belongs to the family Seribacteraceae fam. nov., order Opitutales, class Verrucomicrobiae, and phylum Verrucomicrobiota.  Formerly identified as genus MB11C04 and species MB11C04, in the family MB11C04. A FISH probe for this family has been developed  (probe c21-472 from Orellana et al., 2022) and previously used to describe that members of this genus are short rods of length and width 1.2 and 1.0 µm respectively (Orellana et al., 2022). The type species is Seribacter sulfatis and the corresponding type material is the metagenome-assembled genome ERZ816379, which shows 99.5% ANI to a previously described representative of the MB11C04 family (MB5 from Orellana et al., 2022).