Diatoms of North AmericaDiatoms of North America

Glossary

Like the rest of this website, the glossary is a work in progress. If we’ve missed a term, please contact us to let us know the term and references.

Central tube

A central tube is the central, tubular element of a fultoportula. It extends through the wall of the valve.

Citations

Fultoportulae Int
Image Credit: Marina Potapova
SEM, internal view of valve of Stephanodiscus sp. showing the rimoportula (R), central fultoportula (CF) and four marginal fultoportulae (MF). Each fultoportula has two satellite pores surrounding the central tube.
Stephanodiscus Fultoportula
SEM, internal view of valve of Stephanodiscus sp. showing several fultoportula (one with an arrow). The central pore of the fultoportualae is difficult to distinguish in this image.
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