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IsosphaeraRANK: GenusTAXONOMY: Bacteria -> PVC group -> Planctomycetes -> Planctomycetia -> Planctomycetales -> Isosphaeraceae -> Isosphaera OVERVIEW: Spherical cells 2.0–2.5 µm in diameter forming chains of indefinite length, often over 100 cells. Cell division by budding, intercalary or terminal. No branching occurs. Capsules are not present. Gas vesicles are usually present in all cells, mostly in one cluster (gas vacuole or “pseudovacuole”). Resting cells are not known. Gram variable. Motility by gliding; pili present, no flagella. Phototactic on solid substrate. Strictly aerobic. Temperature range ~40–55°C in culture. Optimal pH range 7.8–8.8.Type species: Isosphaera pallida |