SeqCode Registry
Register List https://seqco.de/r:uh3nyq42 [2026]

Nitrosocosmicus gen. nov.

Submitted by Nicol, Graeme

Table 1: Complete list of names proposed in the current register list.

Proposed Taxon Etymology Description Parent Taxon Type Registry URL
Genus Nitrosocosmicus [Ni.tro.so.cos'mi.cus] N.L. suff. nitroso-, full of natron, here referring to nitrite; L. masc. adj. cosmicus, cosmopolitan; N.L. masc. n. Nitrosocosmicus, cosmopolitan producer of nitrite
A widely distributed genus of chemolithoautotrophic ammonia-oxidising archaea (AOA) within the validated family Nitrososphaeraceae. Cells are coccid. Able to use ammonia as a source of energy with some strains also ureolytic. A greater tolerance to high ammonia concentrations compared to other AOA may be a feature of all strains of this genus. 
Nitrososphaeraceae Nitrosocosmicus franklandianusTs seqco.de/i:56407
Species Nitrosocosmicus franklandianusTs [fran.klan.di.a'nus] N.L. masc. adj. franklandianus, after Percy and Grace Faraday Frankland
In accordance with other members of Nitrososphaerales, Nitrosocosmicus franklandianus (formally franklandus) is an ammonia oxidising archaeon, isolated from a terrestrial environment, demonstrating the characteristic irregular coccoid cell morphology associated with this order. As with Nitrososphaera viennensis, it is able to grow on urea but it can tolerate higher ammonium concentrations, equivalent to those tolerated by chemolithoautotrophic bacterial ammonia oxidisers. It represents an ecologically relevant strain of the phylum Nitrososphaerota/Thermoproteota with the potential to compete successfully with ammonium oxidising bacteria in fertilised soils where ammonium concentrations are high. 
Nitrosocosmicus NCBI Assembly: GCA_900696045.1 Ts seqco.de/i:471