Nitrosospira briensis Winogradsky and Winogradsky 1933 (Approved Lists 1980) Koops H.-P. Harms H. Deoxyriobnucleic acid homologies among 96 strains of ammonia-oxidizing bacteria 1985 141 3 214 218 Archives of Microbiology Arch Microbiol 0302-8933 1432-072X 10.1007/BF00408061 4004447 Aakra A. Utåker J.B. Pommerening-Röser A. Koops H.-P. Nes I.F. Detailed phylogeny of ammonia-oxidizing bacteria determined by rDNA sequences and DNA homology values 2001 51 6 2021 2030 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/00207713-51-6-2021 11760943 Watson S.W. Taxonomic considerations of the family Nitrobacteriaceae Buchanan. Requests for opinions. 1971 21 3 254 270 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-21-3-254 TODO (garrity): This may need an official opinion to be resolved. In 1971 Watson submitted a request for an opinion that proposed ATCC 25961 as a neotype strain for N. briensis. There was no subsequent official opinion validating the neotype strain and N. briensis is listed on the Approved Lists 1980 as having no culture available. In 1985, Koops and Harms stated that ATCC 25971 is equivalent to Nsp10. However, ATCC 25961 and ATCC 25971 are not available in the ATCC catalog.