| WebNameShort | |
| Gaillonella crenulata Ehrenberg 1843 |
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| Gaillonella granulata Ehrenberg 1843 |
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| Gaillonella lirata Ehrenberg 1843 |
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| Gaillonella (Gallionella) coarctata Ehrenberg 1843 |
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| Gaillonella (Gallionella) decussata (decussatam) Ehrenberg 1843 |
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| Gaillonella (Gallionella) marchica Ehrenberg 1843 |
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| Gomphonema anglicum Ehrenberg 1843 |
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| Gomphonema apiculatum Ehrenberg 1843 |
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| Gomphonema cygnus Ehrenberg 1843 |
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| Gomphonema glans Ehrenberg 1843 |
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| Gomphonema laticeps Ehrenberg 1843 |
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| Gomphonema nasutum Ehrenberg 1843 |
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| Gomphonema pupula Ehrenberg 1843 |
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| Gomphonema subtile Ehrenberg 1843 |
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| Gomphonema turris Ehrenberg 1843 |
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| Gomphonema vibrio Ehrenberg 1843 |
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| Goniothecium rogersii Ehrenberg 1843 |
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| Grammatophora gibba Ehrenberg 1843 |
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| Grammatophora islandica Ehrenberg 1843 |
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| Grammatophora stricta Ehrenberg 1843 |
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