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Tryblionella apiculata differs from T. hungarica in the ratio of striae to fibulae. Tryblionella apiculata has a 1:1 ratio of striae to fibulae, while T. hungarica has a ratio of nearly 2:1. In addition, the central constriction of the valve is more apparent in T. apiculata.

LM scalebar = 10 µm
Tryblionella apiculata LM1 Bw8Axial Area Valve Ends Bw2Axial Area Bw 1 Keel Raphe 1Fib Per Str Bw10Keel Raphe
Length Range
39-47 µm
Width Range
5-7 µm
Striae in 10 µm
15-17

Tryblionella hungarica

(Grunow) Freng. 1942

Tryblionella hungarica LM1 Tryblionella hungarica LM5 Tryblionella hungarica LM3 Tryblionella hungarica LM2 Tryblionella hungarica LM4 Tryblionella hungarica LM2 Tryblionella hungarica LM1
Length Range
35-100 µm
Width Range
5-9 µm
Striae in 10 µm
16-19

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