Diatoms of North AmericaDiatoms of North America
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Compare Pleurosigma delicatulum

W.Sm. 1852

Compare

Pleurosigma inflatum is smaller and the raphe is eccentric distal from the central area.

Pleurosigma salinarum var. boyeri rarely exceeds 100 µm in valve length. P

leurosigma elongatum has a minimum width of 20 µm, which is the maximum width for P. delicatulum.

LM scalebar = 10 µm
Pleurosigma Delicatulum Lm7 Pleurosigma Delicatulum Lm5 Pleurosigma Delicatulum Lm1 Pleurosigma Delicatulum Lm3 Pleurosigma Delicatulum Lm2 Pleurosigma Delicatulum Lm4
Length Range
141-183 µm
Width Range
15-18 µm
Striae in 10 µm
19-23 transverse; 16-21 diagonal

Pleurosigma inflatum

Shadbolt 1854

Pleurosigma inflatum LM1 Pleurosigma inflatum LM3 Pleurosigma inflatum LM2 Pleurosigma inflatum LM4 Pleurosigma inflatum LM5
Length Range
65-75 µm
Width Range
16-19 µm
Striae in 10 µm
28-32

Also compare to

Pleurosigma elongatum

BioData Reference
Krammer and Lange-Bertalot 2/1 Pl 113 Fig 4

Pleurosigma salinarum var. boyeri

BioData Reference
Patrick and Reimer 1966 Pl 27 Fig 4a-c