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Category
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Class
Coscinodiscophyceae
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Order
Coscinodiscales
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Family
Hemidiscaeae
Sorted from smallest to largest by maximum length
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Links
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Index Nominum Algarum
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CAS
Spaulding, S.,
Edlund, M.
(2009).
Actinocyclus.
In Diatoms of North America.
Retrieved May 29, 2023, from https://diatoms.org/genera/actinocyclus
Centric
Actinocyclus
- Pseudonodulus present (may be visible only with SEM)
- Several rimoportulae present at margin of valve face
Frustules of Actinocyclus are centric in outline with a relatively narrow mantle. The valve face may be flat or may have concentric undulations in the valve surfaces. Internal openings of rimoportulae are often visible in LM. The genus is distinguished by the presence of a pseudonodulus, a structure found in the three genera...