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Category
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Class
Bacillariophyceae
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Order
Cymbellales
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Family
Rhoicospheniaceae
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.
(2008).
Rhoicosphenia.
In Diatoms of North America.
Retrieved March 22, 2023, from https://diatoms.org/genera/rhoicosphenia
Asymmetric Biraphid
Rhoicosphenia
- One valve with complete raphe
- One valve with small raphe branch (rudimentary raphe)
- Pseudosepta at both poles
- Frustule curved in girdle view
Frustules of Rhoicosphenia are clavate in valve view and heterovalvar. In girdle view, valves are flexed, and curved. As a result of the asymmetry to the transverse axis, the valve face is curved. One valve has a complete raphe with two distinct raphe branches. The other valve has a very small raphe branch on the footpole. Pseudosepta...