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Eunotia enischna is considered to be a member of the E. exigua complex. Eunotia enischna is most similar to E. tenella but E. enischna are more finely striated, more slender, and have more distinctly recurved ends than E. tenella. Valves of E. enischna are more narrow and less distinctly constricted near the apices than the valves of E. exigua sensu stricto. Furthermore, the ventral margin of E. enishna is not as concave as the ventral margin of E. exigua.

LM scalebar = 10 µm
Eunotia enischna LM7 Eunotia enischna LM4 Eunotia enischna LM5 Eunotia enischna LM3 Eunotia enischna LM6 Eunotia enischna LM1 Eunotia enischna LM2
Length Range
15-19 µm
Width Range
2.4-2.6 µm
Striae in 10 µm
23-24 in the center valve, 24-25 at the ends

Eunotia exigua

(Bréb. in Kütz.) Rabenh. 1864

Eunotia exigua LM5 Eunotia exigua LM6 Eunotia exigua LM4 Eunotia Smokies 1 Eunotia exigua LM3 Eunotia exigua LM2 Eunotia exigua LM1
Length Range
7.5-22 µm
Width Range
1.8-3.2 µm
Striae in 10 µm
16-24 in the center, 20-24 at the ends

Eunotia tenella

(Grunow) Hust. in A.Schmidt et al. 1913

Eunotial tenella LM7 Eunotial tenella LM2 Eunotial tenella LM6 Eunotial tenella LM5 Eunotial tenella LM1 Eunotial tenella LM4 Eunotial tenella LM3
Length Range
11-33 µm
Width Range
2.6-3.7 µm
Striae in 10 µm
16-22