Nitrosococcus watsonii Campbell et al. 2011 Campbell M.A. Chain P.S.G. Dang H. El Sheikh A.F. Norton J.M. Ward N.L. Ward B.B. Klotz M.G. Nitrosococcus watsonii sp. nov., a new species of marine obligate ammonia-oxidizing bacteria that is not omnipresent in the world's oceans: calls to validate the names 'Nitrosococcus halophilus' and 'Nitrosomonas mobilis'. 2011 76 1 39 48 FEMS Microbiology Ecology FEMS Microbiol Ecol 0168-6496 10.1111/j.1574-6941.2010.01027.x 21204874