Distigma Ehrenberg, 1838 (ref. ID; 4950)
Order Eutreptiales (ref. ID; 4826, 4852)

[ref. ID; 1618]
Plastic; elongate when extended; body surface without any marking; 2 flagella unequal in length, directed forward; cytostome and cytopharynx located at anterior end; endoplasm usually transparent; holozoic. (ref. ID; 1618)

[ref. ID; 3490]
The cell is strongly metabolic and has two flagella of an unequal length. (ref. ID; 3490)

Distigma proteus Ehrenberg (ref. ID; 1618, 3490) or Ehrenberg em. Pringsheim (ref. ID; 3517, 4950) reported author and year? (ref. ID; 4826)
Syn; Astasia tenax (O.F. Muller) Butschli (ref. ID; 4950); Distigma pseudoproteus Pringsheim (ref. ID; 4950)
Description; Nucleus central; stagnant water; infusion. (ref. ID; 1618)
The cell is generally fusiform and contains numerous rod-shaped paramylum granules and a comparatively long gullet. (ref. ID; 3490)
Measurements; 50-110 um long when extended. (ref. ID; 1618)
A single organism 120 um long. (ref. ID; 3490)