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| Cerataulus radiatus R. Ross in Hartley, Ross & Williams 1986 |
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| Diploneis aestiva var. delicata (A. Schmidt) R. Ross in Hartley 1986 |
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| Diploneis aestiva var. fusca (Gregory) R. Ross in Hartley 1986 |
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| Diploneis pfitzeriana (O'Meara) R. Ross in Hartley 1986 |
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| Epithemia adnata var. intermedia (Husted) R. Ross in Hartley 1986 |
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| Eunotia curvata var. sicula (A. Cleve-Euler) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. bohemicum (Reichelt et Fricke in A. Schmidt) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. fossile (Pantocesk) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. intricatum (Kützing) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. pulvinatum (Braun ex Rabenhorst) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. pumilum (Grunow in Van Heurck) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. pusillum (A. Mayer) R. Ross in Hartley 1986 |
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| Gyrosigma distortum var. diaphanum (Cleve) R. Ross in Hartley 1986 |
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| Gyrosigma reversum (Gregory) Hendey 1986 |
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| Hannaea arcus var. linearis (Holmboe) R. Ross in Hartley 1986 |
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| Hyalodiscus franklinii (Ehrenberg) R. Ross in Hartley 1986 |
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| Navicula derasa var. transitans R. Ross in Hartley 1986 |
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| Navicula flanatica var. ammophila (Grunow) R. Ross in Hartley 1986 |
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| Navicula kariana var. curta (Cleve) R. Ross in Hartley 1986 |
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| Navicula laterostrata var. rostrata (McCall) R. Ross in Hartley 1986 |
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