Diatoms of North AmericaDiatoms of North America
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Compare Tryblionella hungarica

(Grunow) Freng. 1942

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Tryblionella hungarica is distinguished from T. constricta by the more excentric raphe position, distinct fibulae and lack of distinctly protracted, elongated apices. It is distinguished from T. calida by its larger size and lack of protracted narrowly rounded apices. Tryblionella apiculata has more constricted central margins, more apiculate apices and fibulae that are aligned with the striae.

LM scalebar = 10 µm
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

Tryblionella calida

(Grunow in Cleve and Grunow; Grunow in Van Heurck) Stroganov et al. 1927

Tryblionella calida LM1 Tryblionella calida LM2 Tryblionella calida LM4 Tryblionella calida LM3 Tryblionella calida LM5
Length Range
27-54 µm
Width Range
8-10 µm
Striae in 10 µm
30-32

Tryblionella apiculata

W.Greg. 1857

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