Original description: Cells 3-4 (5) µm × 5-8 µm, ovate, base obtuse, slightly metabolic, not compressed. Longer flagellum 1½-2 times the body length, the shorter ¼-⅓ the length of the longer. Haptothrix (attaching organ) contractile, very fine, rarely more than body length when fully extended. Chromatophores two, large, lateral, yellow-green; stigma red, position variable, lateral to sub-apical. Bright refractive bodies of unknown nature, usually 2-3, present at the posterior end.
Last occurrence (top): Extant Data source:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source:
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