Anisonema Dujardin, 1841 (ref. ID; 4921) reported year? (ref. ID; 1618, 3490) or Dujardin, 1841 em. Stein, 1878 (ref. ID; 4950) reported year? (ref. ID; 3517)
Euglenida Butschli, 1884 (ref. ID; 4872)
Order Sphenomondadales (ref. ID; 4826, 4852)

[ref. ID; 1618]
Generally ovoid; more or less flattened; asymmetrical; plastic or rigid; a slit-like ventral furrow; flagella at anterior end; cytopharynx long; contractile vacuole anterior; nucleus posterior; in fresh water. (ref. ID; 1618)

[ref. ID; 3490]
The cell is rigid or somewhat metabolic, compressed and has a longitudinal furrow and two flagella: one is a locomoting flagellum extending forwards and the other a trailing one stretching posteriorly. The later is usually longer and stronger than the former. (ref. ID; 3490)

Anisonema acina Dujardin (ref. ID; 3494)
Comments; The species is different from the A. ovale Klebs, in the somewhat tapering posterior end, presence of several slight longitudinal costae on the surface and possession of a shorter trailing flagellum. (ref. ID; 3494)
Measurements; Length 15-20 um. (ref. ID; 3494)
Anisonema acinus Dujardin (ref. ID; 1618, 3342, 3490, 3517, 4950)
Description; Rigid; oval; somewhat flattened; pellicle slightly striated. (ref. ID; 1618)
The cell 35 um long is ovate and flat. The trailing flagellum is double in length the swimming one. (ref. ID; 3490)
Measurements; 25-40 by 16-22 um. (ref. ID; 1618)
15-20 um. (ref. ID; 3342)
Anisonema emarginatum Stokes (ref. ID; 1618, 4950)
Description; Rigid; flagella long. (ref. ID; 1618)
Measurements; 14 um long. (ref. ID; 1618)
Anisonema ovale Klebs (ref. ID; 3494, 3517, 4950) reported author and year? (ref. ID; 2659)
Description; The colourless compressed species with a smooth surface is oblong in front view and carrys a short swimming flagellum similar to a body length and a longer trailing one twice as long as the former. The reservoir is rather small. (ref. ID; 3494)
Measurements; Length 10-20 um. (ref. ID; 3494)
Anisonema prosgeobia Skuja (ref. ID; 3497)
Description; The ovate body is markedly flattened dorso-ventrally, and has an apparent groove along the median longitudinal line on the concave ventral face. The anterior swimming flagellum is nearly similar to a body in length of somewhat longer than it, while the training one stretching posteriorly in the ventral groove is very long, being 3-6 times as long as a body. The nucleus and reservoir are usually observed in the anterior part of the body. The marine form (salinity 31.63 o/oo) generally had a long training flagellum and small rod-shaped paramylons, while the brackish (salinity 2.00 o/oo) a shorter flagellum and no definite paramylon. (ref. ID; 3497)
Measurements; Length 15-20 um; breadth 12-15 um. (ref. ID; 3497)
Anisonema striata Klebs (ref. ID; 3497)
Description; The ellipsoidal body is compressed dorso-ventrally and provided with a number of longitudinal ridges (usually 8). The presence of ridges is the marked characteristic to the species. (ref. ID; 3497)
Measurements; Length 15-20 um; breadth 10-13 um; thickness 6-7 um. (ref. ID; 3497)
Anisonema trepidum Larsen, 1987 (ref. ID; 4872)
Description; Cell length 20 um. Flagellum pocket and nucleus at the left hand side and no visible ingestion organelle. Cell surface with 3 fine grooves on the ventral side and 4 fine grooves on the dorsal side, widely spaced. Gliding interrupted by sudden stops, direction changed after a quick jerk. (ref. ID; 4872)
Measurements; The cell size is at the large end of the range of 16-20 um given in the original description by Larsen (1987) and exceeds the range 12-17 um given in Larsen & Patterson (1990). (ref. ID; 4872)
Anisonema truncatum Stein (ref. ID; 1618, 4950)
Description; Rigid; elongate ovoid. (ref. ID; 1618)
Measurements; 60 by 20 um. (ref. ID; 1618)
Anisonema variabile Klebs (ref. ID; 3496, 4950)
Description; The elongate species without a chromatophore as long as about 13 um. (ref. ID; 3496)