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| Navicula ramosissima var. torquata (Harvey) R. Ross in Hartley 1986 |
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| Navicula retusa var. cancellata (Donkin) R. Ross in Hartley 1986 |
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| Navicula retusa var. gregorii (Ralfs in Pritchard) R. Ross in Hartley 1986 |
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| Neidium glaberrimum (Østrup) R. Ross in Hartley 1986 |
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| Nitzschia incurva var. lorenziana R. Ross in Hartley 1986 |
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| Nitzschia incurva var. subtilis (Grunow in Cleve et Grunow) R. Ross in Hartley 1986 |
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| Odontella granulata (Roper) R. Ross in Hartley 1986 |
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| Odontella rhombus f. trigona (Cleve ex Van Heurck) R. Ross in Hartley 1986 |
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| Pinnularia ergadensis var. minor (H. et M. Peragallo) R. Ross in Hartley 1986 |
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| Pinnularia legumen var. undulata (M. Peragallo et Héribaud in Héribaud) R. Ross in Hartley 1986 |
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| Rhopalodia operculata var. constricta (Brébisson ex W. Smith) R. Ross in Hartley 1986 |
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| Stauroneis simulans (Donkin) R. Ross in Hartley 1986 |
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| Stenopterobia sigmatella (Gregory) R. Ross in Hartley 1986 |
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| Stenopterobia sigmatella var. capitata (Fontell) R. Ross in Hartley 1986 |
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