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

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