A few members of the bacterial genus Thermus have been shown to be incomplete denitrifiers, terminating with nitrite (NO 2 − ) or nitrous oxide (N 2 O). However, the denitrification abilities of the genus as a whole remain poorly characterized. Here, we describe diverse denitrification phenotypes and genotypes of a collection of 24 strains representing ten species, all isolated from a variety of geothermal systems in China. Co...