Kurtkrammeria neoamphioxys has moderately dorsiventral valves with less strongly arched ventral margins. 
Kurtkrammeria subspicula has narrower valves (5.8-8.7µm) and a higher stria density (16-20 in 10 µm). Kurtkrammeria treinishii has sinuous, rather than straight, striae near the valve center. The tropical species
Kurtkrammeria spicula
and Kurtkrammeria stoermeri have smaller valves and lower stria densities (13-15 and 10-13 in 10 µm, respectively).

LM scalebar = 10 µm
Length Range
58-80 µm
Width Range
8.8-11.1 µm
Striae in 10 µm
10-13 at the valve center, 16-18 near the ends
Encyonadaensis 1
Encyonadaensis 3
Encyonadaensis 4
Encyonadaensis 5
Encyonadaensis 6
Encyonadaensis 1 Encyonadaensis 3 Encyonadaensis 4 Encyonadaensis 5 Encyonadaensis 6

Kurtkrammeria neoamphioxys

(Krammer) Bahls 2015

Length Range
41-59 µm
Width Range
4.9-7.6 µm
Striae in 10 µm
13-15 at the valve center, 15-18 at the ends on the dorsal side
Encyonopsis Neoamphioxys 1 Encyonopsis Neoamphioxys 2 Encyonopsis Neoamphioxys 4 Encyonopsis Neoamphioxys 5 Encyonopsis Neoamphioxys 6
Length Range
47.2-76.4 µm
Width Range
5.7-8.6 µm
Striae in 10 µm
16-20
Encyonopsis Subspicula1 Encyonopsis Subspicula2 Encyonopsis Subspicula3 Encyonopsis Subspicula4 Encyonopsis Subspicula5 Encyonopsis Subspicula6

Kurtkrammeria treinishii

(Bahls) Bahls 2015

Length Range
55-80 µm
Width Range
7.6-10.3 µm
Striae in 10 µm
12-15 at valve center, 14-17 near the apices
Encyotreinischii 1 Encyotreinischii 2 Encyotreinischii 3 Encyotreinischii 4 Encyotreinischii 5 Encyotreinischii 6

Also compare to

Kurtkrammeria spicula

(Hust.) Ohtsuka 2018

Kurtkrammeria stoermeri

(Lange-Bert. and Metzeltin) Bahls 2015