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Category
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Class
Bacillariophyceae
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Order
Eunotiales
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Family
Eunotiaceae
Sorted from smallest to largest by maximum length
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Citations
Edlund, M.B., Burge, D.R.L., Andresen, N.A., Vandermeulen, D.D., Stone, J.R. and Van De Vijver, B. (2021) The genus Semiorbis (Eunotiaceae, Bacillariophyta) in North America Diatom Research
Krammer, K. and Lange-Bertalot, H. (1991) Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.
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Links
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Index Nominum Algarum
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CAS
Edlund, M.,
Burge, D.
(2015).
Semiorbis.
In Diatoms of North America.
Retrieved February 04, 2023, from https://diatoms.org/genera/semiorbis
Eunotioid
Semiorbis
- Valves strongly lunate
- Transapical, external costae
- Spines on dorsal and ventral ends of costae
Valves are strongly lunate, with thick, external, transverse costae between striae. The costae often terminate in spines at the dorsal and ventral margins. A small, greatly reduced raphe is present at the poles. The raphe is typically not visible in LM. The proximal raphe ends are on the ventral margin, while the terminal fissures curve...