Differentiation of the genus Thiolamprovum from

other genera

Characteristics for differentiation of Thiolamprovum species from other phototrophic members of the family Chromatiaceae are shown in Table BXII.y.6 of the chapter describing the family Chromatiaceae. Thiolamprovum is characterized by the formation of platelets of 8-16 or more regularly arranged cells, similar to Thiopedia rosea. These bacteria can be distinguished by their different carotenoid content and color of cultures and colonies. Thiolamprovum cells contain carotenoids of the spirilloxanthin group with a pinkish color of the colonies, whereas Thiopedia rosea cells contain okenone with a purple color of the colonies. The phylogenetic relationship of Thiolamprovum pedioforme to other Chromatiaceae species, based on 16S rDNA sequence comparison, is shown in Fig. BXII.y.4 of the chapter describing the family Chromatiaceae.

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