Diatoms of North AmericaDiatoms of North America
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Compare Diploneis dilatata

(M.Peragallo) Lange-Bert. and Fuhrmann 2016

Compare

Diploneis elliptica and D. ovalis have uniseriate striae. 

Diploneis dilatatafalsa and D. lusatica have smaller valves (on average), a narrower axial area, and short, curved proximal raphe ends. Furthermore, striae of D. dilatatafalsa are triseriate near the valve margin. The valve apices of D. lusatica  are slightly cuneate. 

Diploneis sanantoniensis has a narrower axial area and oval, rather than rhombo-elliptic, valve outline.

LM scalebar = 10 µm
Diploneis dilatata LM7 Diploneis dilatata LM6 Diploneis dilatata LM5 Diploneis dilatata LM4 Diploneis dilatata LM3 Diploneis dilatata LM2 Diploneis dilatata LM1
Length Range
34-84 µm
Width Range
25-50 µm
Striae in 10 µm
8-10

Diploneis elliptica

(Kütz.) Cleve 1894

Diploneis elliptica LM1 Dielliptica 1 Dielliptica 2 Dielliptica 3 Dielliptica 4 Dielliptica 5
Length Range
30-65 µm
Width Range
17-36 µm
Striae in 10 µm
9-10

Diploneis ovalis

(Hilse) Cleve 1891

Diploneis Ovalis 1 Diploneis Ovalis 2 Diploneis Ovalis 3 Diploneis Ovalis 4 Diploneis Ovalis 5 Diploneis Ovalis 6 Diploneis Ovalis 7
Length Range
32.5-58.7 µm
Width Range
20.7-32.6 µm
Striae in 10 µm
12-14

Also compare to

Diploneis lusatica

Lange-Bert. and Fuhrmann

Diploneis sanantoniensis

Lange-Bert. and Fuhrmann

Diploneis dilatatafalsa

Lange-Bert. and Fuhrmann