| WebNameShort | |
| Navicula pseudoconfervacea Manguin 1952 |
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| Navicula pseudographa Manguin 1952 |
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| Navicula radiosa f. divergentissima Manguin 1952 |
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| Navicula spectrum Manguin 1952 |
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| Navicula subhalophila f. fossilis Manguin 1952 |
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| Navicula vexativa Manguin 1952 |
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| Navicula vulpina var. ranomafanensis Manguin 1952 |
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| Neidium affine (affinis) var. ranomafanensis Manguin 1952 |
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| Nitzschia granulata f. impressa Manguin 1952 |
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| Nitzschia hungarica var. apiculata Manguin & Bourrelly in Manguin 1952 |
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| Nitzschia linearis f. major Manguin 1952 |
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| Nitzschia obtusa var. gracillima Manguin 1952 |
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| Nitzschia thermalis var. amphicephala Manguin 1952 |
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| Pinnularia brevicostata var. cuneata Manguin 1952 |
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| Pinnularia mesolepta var. medioconstricta (medio-constricta) Manguin 1952 |
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| Stauroneis anceps var. semiaperta Manguin 1952 |
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| Surirella lenoblei Manguin 1952 |
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| Surirella spinifera var. fossilis Manguin 1952 |
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| Surirella tesselata Manguin 1952 |
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| Surirella (Suriraya) angusta (angustata) var. sinuata Manguin 1952 |
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