Frickea
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Category
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ClassBacillariophyceae
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OrderNaviculales
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FamilyAmphipleuraceae
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Type SpeciesFrickea lewisiana (Greville) Heiden in A. Schmidt et al. 1906 (= Navicula lewisiana Greville 1863)
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ContributorCarrie Graeff - Mar 2011
Displaying 1 of 1 species
Sorted from smallest to largest by maximum length
Citations & Links
Citations
Links
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Index Nominum Algarum
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CAS
Cite This Page
Graeff, C. (2011). Frickea. In Diatoms of North America. Retrieved May 01, 2026, from https://diatoms.org/genera/frickea?x-craft-preview=409442409a997390693ff24c7010fd6f1c96fb56f8f091fa016a63de9a54aaccecpiqubknd
Symmetric Biraphid
Frickea
- Distinct longitudinal ribs present
- Ribs extend to the helictoglossa, but do not fuse
- Rows of areolae present between ribs and raphe
- Large, T-shaped distal raphe fissures
- Large, T-shaped proximal raphe fissures
Species within Frickea have valves that are linear-lanceolate with bluntly rounded apices. The striae are comprised of relatively small, round areolae. Internally, a set of longitudinal ribs encloses the full length of the raphe and is continuous through the center of the valve. The longitudinal ribs extend to a linear helictoglossa but...