Compare Brachysira subtilis
Brachysira procera, B. ocalanensis and B. styriaca have unprotracted apices, but each of these taxa have lanceolate valves that are slightly wider. Brachysira procera and B. styriaca have a lower lower stria density.
LM scalebar = 10 µm
Length Range
19-30 µm
19-30 µm
Width Range
3-4 µm
3-4 µm
Striae in 10 µm
32-38
32-38
Length Range
19.0-38.6 µm
19.0-38.6 µm
Width Range
4.0-5.7 µm
4.0-5.7 µm
Striae in 10 µm
32-34, more closely spaced towards the apices
32-34, more closely spaced towards the apices
Length Range
15.5-36.6 µm
15.5-36.6 µm
Width Range
4.9-7.1 µm
4.9-7.1 µm
Striae in 10 µm
26-30
26-30
Also compare to
Brachysira procera
BioData Reference
Lange-Bertalot and Moser 1994 Pl 7 Fig 8-26