Diatoms of North AmericaDiatoms of North America
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Compare Campylodiscus clypeus

(Ehrenb.) Ehrenb. ex Kütz. 1844

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Campylodiscus bicostatus has uninterrupted fibulae from the central area to the edge of the valve.

LM scalebar = 10 µm
Campylodiscus clypeus_LM7 Campylodiscus clypeus_LM6 Campylodiscus clypeus_LM5 Campylodiscus clypeus_LM4 Campylodiscus clypeus_LM3 Campylodiscus clypeus_LM2 Campylodiscus clypeus LM1
Length Range
76.5-136.6 µm

Also compare to

Campylodiscus bicostatus

W. Smith in Roger 1854