Name: Caldithrix abyssi Miroshnichenko et al. 2003

Category: Species

Proposed as: sp. nov.

Etymology: a.bys’si. L. gen. fem. n. abyssi, of immense depths, living in the depth of the ocean

Pronunciation (Latin), gender: KAL-di-t^hrix a-BYS-si, feminine

Type strain: DSM 13497; LF13; VKM B-2286

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ430587 Analyse FASTA

Valid publication: Miroshnichenko ML, Kostrikina NA, Chernyh NA, Pimenov NV, Tourova TP, Antipov AN, Spring S, Stackebrandt E, Bonch-Osmolovskaya EA. Caldithrix abyssi gen. nov., sp. nov., a nitrate-reducing, thermophilic, anaerobic bacterium isolated from a Mid-Atlantic Ridge hydrothermal vent, represents a novel bacterial lineage. Int J Syst Evol Microbiol 2003; 53:323-329. 🇷🇺

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 53, part 1 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:629-630.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Kublanov et al. 2017 Kublanov IV, Sigalova OM, Gavrilov SN, Lebedinsky AV, Rinke C, Kovaleva O, Chernyh NA, Ivanova N, Daum C, Reddy TB, et al. Genomic Analysis of Caldithrix abyssi, the Thermophilic Anaerobic Bacterium of the Novel Bacterial Phylum Calditrichaeota. Front Microbiol 2017; 8:195. 🇷🇺 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 🥇 Nomenclatural type of the genus Caldithrix Miroshnichenko et al. 2003. Publication: Miroshnichenko ML, Kostrikina NA, Chernyh NA, Pimenov NV, Tourova TP, Antipov AN, Spring S, Stackebrandt E, Bonch-Osmolovskaya EA. Caldithrix abyssi gen. nov., sp. nov., a nitrate-reducing, thermophilic, anaerobic bacterium isolated from a Mid-Atlantic Ridge hydrothermal vent, represents a novel bacterial lineage. Int J Syst Evol Microbiol 2003; 53:323-329. 🇷🇺
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 7 times in PubMed until 2026-06-11.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Mukherjee S, Seshadri R, Varghese NJ, Eloe-Fadrosh EA, Meier-Kolthoff JP, Goker M, Coates RC, Hadjithomas M, Pavlopoulos GA, Paez-Espino D, et al. 1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life. Nat Biotechnol 2017; 35:676-683. 🇺🇸

Parent taxon: Caldithrix Miroshnichenko et al. 2003

Assigned by: Miroshnichenko ML, Kostrikina NA, Chernyh NA, Pimenov NV, Tourova TP, Antipov AN, Spring S, Stackebrandt E, Bonch-Osmolovskaya EA. Caldithrix abyssi gen. nov., sp. nov., a nitrate-reducing, thermophilic, anaerobic bacterium isolated from a Mid-Atlantic Ridge hydrothermal vent, represents a novel bacterial lineage. Int J Syst Evol Microbiol 2003; 53:323-329. 🇷🇺

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Record number: 774349