Formal styling
Tiamatella St. John, Reysenbach, 2024
Effective publication
St. John, Reysenbach, 2024
SeqCode status
Valid (SeqCode)
Register List
seqco.de/r:kxlu-6m0 (validated)
Cannonical URL


Inferred stem
N.L. dim. fem. n. Tiamatella, little Tiamat, referring to an ancient Mesopotamian primordial sea goddess
Nomenclatural type
Tiamatella incendiivivensTs
Nomenclatural status
Validly published under the SeqCode


Delineation of this genus is supported by AAI, phylogenomic analysis, 16S rRNA gene comparison and taxonomic assignment in GTDB. MAGs assigned to this genus have been identified at two hydrothermal vent fields along the Eastern Lau Spreading Center (ABE and Tui Malila), Mariner vent field on the Valu Fa Ridge, Lau Basin, the Lower Cone of the deep-sea Brothers volcano along the Kermadec arc and Lucky Strike vent field along the Mid-Atlantic Ridge. Members of this taxon are approximately 51–54% similar to Aeropyrum pernix and 50–52% similar to Caldisphaera lagunensis by AAI. They form a well-supported monophyletic clade in a concatenated phylogenomic tree constructed using 53 archaeal genes. A 16S rRNA gene recovered from the type genome shows ~89 to 91% similarity to Aeropyrum pernix, Aeropyrum camini, Thermodiscus maritimus and Stetteria hydrogenophila. Based on functional genomic analysis, members of this genus are likely anaerobic and may utilize proteins or amino acids as carbon sources. They are auxotrophic for purines and pyrimidines. Several members of this genus also encode DMSO reductase family genes from the psrA/phsA/sreA/srrA clade and may utilize polysulfides, thiosulfate, sulfur, and/or selenite as energy sources. ANI analysis suggests this genus includes at least five distinct species, and motility is likely variable between species. The name proposed here is derived from a primordial Mesopotamian sea goddess depicted as both a chaotic and creative force, and it references the turbulent but biologically rich environments in which these Archaea inhabit.
Archaea » Thermoproteota » Thermoprotei » Acidilobales » Acidilobaceae » Tiamatella
Children (1)


Search sequences
Local history
Registered by
St. John, Emily 10 months ago
Submitted by
St. John, Emily 2 months ago
Endorsed by
Palmer, Marike 2 months ago
Validated by
Palmer, Marike 13 days ago


Citation Title
St. John, Reysenbach, 2024, Systematic and Applied Microbiology Genomic comparison of deep-sea hydrothermal genera related to Aeropyrum, Thermodiscus and Caldisphaera, and proposed emended description of the family Acidilobaceae
Effective publication

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