A&B = End of cell with process (arrow=otaria); C = Two ends (dry preparation). (A=PC, B&C=DIC)
Life-form: Solitary or in pairs
Size: Diameter = 4.5 -25 µm
Note: See taxonomical discussion in Sundström (1986)
Distinctive features: Pointed otaria extending at least 3 µm along the basal part of the process
Similar species: Rhizosolenia antennata f. semispena R. clevei var. communis
Distribution: Northern cold-water region
Sundström, B. G.1986. The marine genus Rhizosolenia. Doctoral Dissertation, Lund University, Lund, Sweden. 117 pp.