Tellurarchaeum carbonatiphilum gen. nov. sp. nov.

A genus within the (Thaumarchaeal) Group 1.1c archaea. Members of this genus are primarily found in CO2-rich environments and are characterized by their carbonate-loving nature.

The type genomic sequence is derived from a metagenome-assembled genome (MAG) recovered from groundwater samples. The sample site is characterized by micro-oxic and carbonate-rich condition with low ionic strength and acidic pH (pH 4.8) at a temperature of 7.6 °C.
The genome size is approximately 1.77 Mbp, with a G+C content of 58%. The MAG quality is estimated by a completeness of 97.53% and a contamination of 2.8%, as estimated by CheckM2.
The potential metabolic reconstruction indicates that the organism is a heterotroph and is capable of inhabiting micro-oxic environments. The genome contains various glycoside hydrolases and carbohydrate-active enzymes (e.g., GH33, AA10, GT2), suggesting a lifestyle based on the degradation of organic carbohydrates.
It is distinguished from other related taxa in (thaumarchaeal) Group 1.1c by an Average Nucleotide Identity (ANI) values ranging from 64% to 73%, which are well below the species delimitation threshold (95%).
The type genomic sequence is named to “Tellurarchaeum carbonatiphilum”, and it is deposited in GenBank under the accession number GCA_032906765. The raw sequence reads are available under the SRA accession number SRS9415155, and the overall project information is registered under BioProject PRJNA744312.