Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Fragilaria tenera

(W.Sm.) Lange-Bert. 1980

Compare

The valve shape of F. tenera is somewhat similar to F. crotonensis. However, valves of F. crotonensis are larger than F. tenera and have an inflated central margin. In addition, F. crotonensis forms ribbon-like colonies composed of several to hundreds of frustules, while F. tenera rarely forms colonies.

LM scalebar = 10 µm
F Tenera 114970 3 10 Um Bar F Tenera 114970 6 10 Um Bar F Tenera 114970 9 10 Um Bar F Tenera 114970 5 10 Um Bar F Tenera 114970 8 10 Um Bar F Tenera 114970 7 10 Um Bar F Tenera 114970 4 10 Um Bar
Length Range
50-75 µm
Width Range
2.0-2.5 µm
Striae in 10 µm
15-17

Fragilaria crotonensis

Kitton 1869

Ansp Gc112455 5 Ansp Gc112455 6 Ansp Gc112455 1 Ansp Gc112455 11 Ansp Gc112455 3
Length Range
60-72 µm
Width Range
2-3 µm
Striae in 10 µm
17-18