Abstract
Strain TT4B, isolated from freshwater sediments contaminated with chlorinated ethylenes, is described as Desulfuromonas chloroethenica sp. nov. This organism grows with acetate or pyruvate as electron donors and tetrachloroethylene, trichloroethylene, fumarate, polysulfide, and Fe(III) nitriloacetate as electron acceptors. D. chloroethenica is unique among the desulfuromonads in using chloroethylenes as electron acceptors. It is phenotypically and phylogenetically most closely related to Desulfuromonas acetexigens and shares many other features with this species.