Diatoms of North AmericaDiatoms of North America
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Compare Surirella lacrimula

J.D. English 2012

Surirella pinnata has narrow, linear valves, with costae that extend from the fibulae to the midline.
Surirella ovalis, S. iowensis, and S. brebissoni have a greater size range and may be up to, or greater than, 55 μm. The stria density is lower in these taxa. Surirella iowensis may be twisted about the apical axis.
Surirella atomus, S. stalagma, and S. suecica are more narrow in width.
Surirella minuta has a greater range in length and a broader footpole.

LM scalebar = 10 µm
Surirella lacrimula LM1 Suirella lacrimula LM2 Suirella lacrimula LM3 Surirella lacrimula LM4 Surirella lacrimula LM5 Surirella lacrimula LM6 Surirella lacrimula LM7
Length Range
19-30 µm
Width Range
10-13 µm
Striae in 10 µm
27-33

Surirella pinnata

W.Smith 1853

Surirella minuta LM1 Surirella minuta LM5 Surirella minuta LM2 Surirella minuta LM3 Surirella minuta LM6 Surirella minuta LM4 Surirella minuta LM7
Length Range
18-71 µm
Width Range
8.5-14 µm
Striae in 10 µm
25-32

Surirella ovalis

Bréb. 1838

Gc109807B Ovalis 6 Gc106518B Ovalis 3 Gc109807B Ovalis 5 Gc109807B Ovalis 4 Gc106518B Ovalis 1 Gc109807B Ovalis 2 Gc109807B Ovalis 3
Length Range
14-75 µm
Width Range
11-35 µm
Striae in 10 µm
14-17

Surirella iowensis

R.L.Lowe 1973

Surirella iowensis LM7 Surirella iowensis LM6 Surirella iowensis LM4 Surirella iowensis LM2 Surirella iowensis LM3 Surirella iowensis LM1 Surirella iowensis LM5
Length Range
21-54 µm
Width Range
15-33 µm
Striae in 10 µm
16-26

Surirella brebissonii

Krammer and Lange-Bert. 1987

Gc112761A Brebissonii 9 Gc112761A Brebissonii 10 Gc112761A Brebissonii 4 Gc112761A Brebissonii 3 Gc112761A Brebissonii 8 Gc109819B Brebissonii 3 Gc112761A Brebissonii 7
Length Range
15.5-56 µm
Width Range
10-25 µm
Striae in 10 µm
18-23

Surirella atomus

Hust. 1955

Surirella atomus LM5 Surirella atomus LM7 Surirella atomus LM1 Surirella atomus LM2 Surirella atomus LM4 Surirella atomus LM3 Surirella atomus LM6
Length Range
8-19 µm
Width Range
5-8 µm
Striae in 10 µm
Fibulae 8-10

Surirella stalagma

M.H.Hohn and Hellerman 1963

Surirella stalagma LM6 Surirella stalagma LM2 Surirella stalagma LM7 Surirella stalagma LM4 Surirella stalagma LM5 Surirella stalagma LM1 Surirella stalagma LM3
Length Range
11-16 µm
Width Range
5-7 µm
Striae in 10 µm
55

Surirella suecica

Grunow in Van Heurck 1881

Gc45805 Suecica 3 Gc111490B Suecica 2 Gc111490B Suecica 1 Gc110482A Suecica 1 Gc45805 Suecica 1 Gc105958A Suecica 1 Gc45805 Suecica 2
Length Range
14-34 µm
Width Range
7-9.5 µm
Striae in 10 µm
30-36

Also compare to

Surirella minuta

Bréb.

BioData Reference
KandL-B 2/2 Pl 134 Fig 2 Pl 135 Fig 1-14