An.ca' lo.chlo' ris Gr. masc. n. ancalos arm; Gr. adj. chloros green; M.L. neut. n. Ancalochloris arm (-producing) green (microbe)

Chlorobi / “Chlorobia” / Subclass I “Chlorobiales” / “Chlorobiaceae” / Ancalochloris

Bacteria of irregular shape, forming prosthecae of irregular length that are wide at the base and pointed at the end (Figure 1). The length of prosthecae can exceed the cell diameter. These bacteria multiply by unequal fission and form irregular chains of cells and typically form perforated microcolonies. Non-motile. Gram negative. Contain bacteriochlorophylls and carotenoid pigments. The photosynthetic apparatus includes antenna structures of the chlorosome type, ovoid vesicles underlying and attached to the cytoplasmic membrane (Figures 1 and 2). Cells contain gas vacuoles.

The mol% G + C of the DNA is: unknown.

Type species: Ancalochloris perfilievii Gorlenko and Lebedeva 1971, 1038.