Pleurosigma diversestriatum has valves that are less arched, with a lower stria density, a smaller central area, a less eccentric raphe position and greater raphe angles. The raphe of P. aestuarii is less eccentric. Pleurosigma marinum is larger (110-180 µm), with a greater raphe angle (61-89°).

LM scalebar = 10 µm
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

Also compare to

Pleurosigma diversestriatum

F.Meister 1935

Pleurosigma aestuarii

(Bréb. ex Kütz.) W.Sm.

Pleurosigma marinum

Donkin 1858