| Genus |
Cell
Shape |
Flagella |
pH
Range |
Relation
to
Oxygen |
G+C
Moles
in
% |
| Thiobacillus |
Rods |
Polar |
Wide |
Obligate
aerobes
except
T.denitrificans |
50-68 |
| Sulfolobus |
Spherical
with
lobes |
Absent |
0.9
-
5.8 |
Aerobic |
60-68 |
| Thiovulum |
Round
to
Ovoid |
Peritrichous |
- |
Microaerophilic |
- |