Description of Candidatus Merdenecus pullicola sp. nov.

Candidatus Merdenecus pullicola (pul.li’co.la. L. masc. n. pullus a young chicken; L. suff. -cola inhabitant of; N.L. n. pullicola an inhabitant of young chickens)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID CHK160-2840 and which is available via NCBI BioSample SAMN15817122. The GC content of the type genome is 35.46% and the genome length is 2.6 Mbp.

Description of Candidatus Merdibacter merdavium sp. nov.

Candidatus Merdibacter merdavium (merd.a’vi.um. L. fem. n. merda faeces; L. fem. n. avis bird; N.L. gen. n. merdavium of bird faeces)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID CHK187-11901 and which is available via NCBI BioSample SAMN15816582. The GC content of the type genome is 53.13% and the genome length is 2.1 Mbp.

Description of Candidatus Merdibacter merdigallinarum sp. nov.

Candidatus Merdibacter merdigallinarum (mer.di.gal.li.na’rum. L. fem. n. merda faeces; L. fem. n. gallina hen; N.L. gen. n. merdigallinarum of hen faeces)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID ChiGjej6B6-453 and which is available via NCBI BioSample SAMN15816595. The GC content of the type genome is 53.92% and the genome length is 1.8 Mbp.

Description of Candidatus Merdibacter merdipullorum sp. nov.

Candidatus Merdibacter merdipullorum (mer.di.pul.lo’rum. L. fem. n. merda faeces; L. masc. n. pullus a young chicken; N.L. gen. n. merdipullorum of the faeces of young chickens)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID ChiGjej1B1-19782 and which is available via NCBI BioSample SAMN15816850. This is a new name for the alphanumeric GTDB species sp900543035. The GC content of the type genome is 55.41% and the genome length is 1.9 Mbp.

Description of Candidatus Merdicola gen. nov.

Candidatus Merdicola (Mer.di’co.la. L. fem. n. merda dung; L. suff. -cola inhabitant of; N.L. fem. n. Merdicola a microbe associated with faeces)

A bacterial genus identified by metagenomic analyses. The genus includes all bacteria with genomes that show ≥60% average amino acid identity (AAI) to the type genome from the type species Candidatus Merdicola faecigallinarum. This is a name for the alphanumeric GTDB genus CAG-354. This genus has been assigned by GTDB-Tk v1.3.0 working on GTDB Release 05-RS95 (Chaumeil et al., 2019; Parks et al., 2020) to the order TANB77 and to the family CAG-508.

Description of Candidatus Merdicola faecigallinarum sp. nov.

Candidatus Merdicola faecigallinarum (fae.ci.gal.li.na’rum. L. fem. n. faex, faecis excrement; L. fem. n. gallina hen; N.L. gen. n. faecigallinarum of hen faeces)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID CHK195-15760 and which is available via NCBI BioSample SAMN15817051. The GC content of the type genome is 28.83% and the genome length is 1.5 Mbp.

Description of Candidatus Merdimorpha gen. nov.

Candidatus Merdimorpha (Mer.di.mor’pha. L. fem. n. merda dung; Gr. fem. n. morphe a form, shape; N.L. fem. n. Merdimorpha a microbe associated with faeces)

A bacterial genus identified by metagenomic analyses. The genus includes all bacteria with genomes that show ≥60% average amino acid identity (AAI) to the type genome from the type species Candidatus Merdimorpha intestinavium. This is a name for the alphanumeric GTDB genus UBA1820. This genus has been assigned by GTDB-Tk v1.3.0 working on GTDB Release 05-RS95 (Chaumeil et al., 2019; Parks et al., 2020) to the order Flavobacteriales and to the family UBA1820.

Description of Candidatus Merdimorpha intestinavium sp. nov.

Candidatus Merdimorpha intestinavium (in.tes.tin.a’vi.um. L. neut. n. intestinum gut; L. fem. n. avis bird; N.L. gen. n. intestinavium of the gut of birds)

A bacterial species identified by metagenomic analyses. This species includes all bacteria with genomes that show ≥95% average nucleotide identity (ANI) to the type genome, which has been assigned the MAG ID CHK1-7158 and which is available via NCBI BioSample SAMN15817210. This is a new name for the alphanumeric GTDB species sp002314265. The GC content of the type genome is 56.50% and the genome length is 1.8 Mbp.