Fogedia, Witkowski, Lange-Bertalot, Metzeltin & Bafana, 1997
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publication ID |
https://doi.org/ 10.11646/phytotaxa.554.1.6 |
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DOI |
https://doi.org/10.5281/zenodo.6819220 |
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persistent identifier |
https://treatment.plazi.org/id/8C12E44D-0938-FF8F-FF41-8CBE759EFE54 |
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treatment provided by |
Plazi |
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scientific name |
Fogedia |
| status |
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Key to species of the genus Fogedia
1a Cells are heterovalvate .............................................................................................................................................. F. heterovalvata
1b Cells are not heterovalvate .................................................................................................................................................................2
2a Valves with lateral area.......................................................................................................................................................................3
2a Valves without lateral area..................................................................................................................................................................9
3a Central area with stauros-like transverse expansion ..........................................................................................................................4
3b Central area without transverse expansion .........................................................................................................................................5
4a Striae 16-18 in 10 μm ............................................................................................................................................................. F. acuta
4b Striae 9-13, Areolae 35-40 in 10 μm ............................................................................................................................. F. finmarchica
4c Striae 10-12, Areolae 26-29 in 10 μm .............................................................................................................................. F. krammeri
5a External terminal raphe fissure hooked..............................................................................................................................................6
5b External terminal raphe fissure simple or slightly bent......................................................................................................................8
6a Areolae 26-29 in 10 μm............................................................................................................................................................. F. lyra
6b Areolae 35-40 in 10 μm......................................................................................................................................................................7
7a Valves 15.5-18.5 μm long, 6.5-7 μm wide .................................................................................................................. F. christensenii
7b Valves 26-37 μm long, 8-9 μm wide ............................................................................................................................... F. giffeniana
8a Striae parallel in the middle of the valve................................................................................................ F. giffeniana var. yemenitica
8b Striae radiate in the middle of the valve.......................................................................................................................... F. geisslerae
9a Valves elliptic with broad apices ........................................................................................................................................ F. elliptica
9b Valves with distinctively protracted apices ......................................................................................................................................10
10a Striae parallel in the middle of the valve.......................................................................................................................... F. orientalis
10b Striae radiate in the middle of the valve...........................................................................................................................................11
11a Striae 12-14, Areolae 15 in 10 μm...................................................................................................................................... F. coreana
11b Striae 18-21, Areolae 21-24 in 10 μm .................................................................................................................................... F. densa
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