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Encyonopsis stafsholtii is similar in shape to E. montana, but E. montana has proportionately much larger valves (up to 75 µm long) and a lower stria density (19-22 in 10 µm). Large valves of E. neerlandica are also rhombic-lanceolate, but this taxon lacks a central area. Encyonopsis cesatii has strictly lanceolate valves with abruptly protracted apices and a lower stria density (16-22 in 10 µm).

LM scalebar = 10 µm
Estafsholtii 1 Estafsholtii 2 Estafsholtii 3 Estafsholtii 4 Estafsholtii 5 Estafsholtii 6 Estafsholtii 7
Length Range
24.9-44.7 µm
Width Range
5.1-6.3 µm
Striae in 10 µm
22-25

Encyonopsis cesatii

(Rabenh.) Krammer 1997

Encyocesatii 1 Encyocesatii 2 Encyocesatii 3 Encyocesatii 4 Encyocesatii 5 Encyocesatii 6 Encyocesatii 7
Length Range
22.0-38.8 µm
Width Range
4.6-6.0 µm
Striae in 10 µm
16-19 at the valve center, 21-22 near the apices

Encyonopsis montana

L.L.Bahls 2013

Encyonopsis Montana 1 Encyonopsis Montana 2 Encyonopsis Montana 3 Encyonopsis Montana 4 Encyonopsis Montana 5
Length Range
37-75 µm
Width Range
7.0-8.8 µm
Striae in 10 µm
19-21 at the valve center, 21-22 near the apices

Encyonopsis neerlandica

Van de Vijver et al. 2012

Encyonopsis Montana0 Encyonopsis Montana1 Encyonopsis Montana2 Encyonopsis Montana3 Encyonopsis Montana4 Encyonopsis Montana5 Encyonopsis Montana6
Length Range
13.7-26.1 µm
Width Range
3.3-4.4 µm
Striae in 10 µm
24-28