Carotenoids Groups of Phototrophic Bacteria -
| Group | Name | Major Components |
| 1 | Normal Spirilloxanthin Series | Lycopene
|
| 2 | Alternative Spirilloxanthin Series and Ketocarotenoids | Spheroidene Hydroxyspheroidene Spheroidene Hydroxyspheroidene |
| 3 | Okenone Series | Okenone |
| 4 | Rhodopinal Series | Lycopenal Lycopenol Rhodopin Rhodopinal Rhodopinol |
| 5 | Chlorobactene Series | Chlorobactene Hydroxychlorobactene Beta-Isorenieratene Isorenieratene |