Fifty-six strains of “hydrogen bacteria” and related nonautotrophic bacteria, including nearly all existing named spp., have been compared. It is proposed that the genus should be rejected, since its type species H. , appears to be a ; and that the various species of “hydrogen bacteria” should be assigned to other genera, not specifically characterized by the ability to grow autotrophically with H.

The two species of hydrogen bacteria most frequently isolated by enrichment show a peritrichous or degenerate peritrichous flagellar arrangement; one is nonpigmented, the other produces yellow (carotenoid) cellular pigments. Of the various possible generic assignments for these two species, assignment to the genus is proposed. The nonpigmented species, previously named , but never legitimately described, is here described as . The yellow species which includes both facultatively autotrophic and nonautotrophic strains, is described as a new species, . The Gram-negative, coccoid hydrogen bacterium, formerly known as , is placed in a new genus, . The polarly flagellated species of hydrogen bacteria, including the previously named species and Pseudomonassa saccharophila, are all assigned to the genus .


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error