Ectothiorhodospira

Ec' to.thi' o.rho' do.spi' ra. Gr. prep. ectos outside; Gr. n. thios sulfur; Gr. n. rhodon the rose; Gr. n. spira the spiral; M.L. fem. n. Ectothiorhodospira spiral rose with sulfur outside. Proteobacteria / Gammaproteobacteria / Chromatiales / Ectothiorhodospiraceae / Ectothiorhodospira Cells rod-shaped or vibrioid, also appearing as true spirals, 0.7–1.5 µm in diameter, motile by a polar tuft of flagella, multiply by binary fission, and may contain gas vesicles. Gram-negative and belong to the Gammaproteobacteria. Internal photosynthetic membranes are lamellar stacks that are continuous with the cytoplasmic membrane. Photosynthetic pigments are bacteriochlorophyll a and carotenoids. The mol% G + C of the DNA is: 61.4–68.4. Type species: Ectothiorhodospira mobilis Pelsh 1936, 120