| [12007] Coscinodiscus marginatus | Appellations de Taxon | 12007 |
| [12008] Cocconeis maxima | Appellations de Taxon | 12008 |
| [12009] Cyclotella michiganiana | Appellations de Taxon | 12009 |
| [1201] Porellaceae | Appellations de Taxon | 1201 |
| [12010] Cymbellopsis metzeltinii | Appellations de Taxon | 12010 |
| [12011] Cymbella mexicana var. mexicana | Appellations de Taxon | 12011 |
| [12012] Cymbella maggiana | Appellations de Taxon | 12012 |
| [12013] Chamaepinnularia margaritiana | Appellations de Taxon | 12013 |
| [12014] Cymbopleura mirifica | Appellations de Taxon | 12014 |
| [12015] Cymbellopsis mirabilis | Appellations de Taxon | 12015 |
| [12016] Cymbella mexicana var. kamtschatica | Appellations de Taxon | 12016 |
| [12017] Craticula molestiformis | Appellations de Taxon | 12017 |
| [12018] Cymbella mexicana var. punctifera | Appellations de Taxon | 12018 |
| [12019] Cymatoneis margarita | Appellations de Taxon | 12019 |
| [1202] Madotheca | Appellations de Taxon | 1202 |
| [12020] Caloneis marnieri | Appellations de Taxon | 12020 |
| [12021] Cyclotella meneghiniana var. stigmata | Appellations de Taxon | 12021 |
| [12022] Cyclotella meneghiniana abnormal form | Appellations de Taxon | 12022 |
| [12023] Cymbella metzeltinii | Appellations de Taxon | 12023 |
| [12024] Cyclotella multipunctata | Appellations de Taxon | 12024 |
| [12025] Cymbella neuquina var. neuquina | Appellations de Taxon | 12025 |
| [12026] Cymbella neuquina var. fastigata | Appellations de Taxon | 12026 |
| [12027] Ceratoneis fusiformis | Appellations de Taxon | 12027 |
| [12028] Cymbella neglecta | Appellations de Taxon | 12028 |
| [12029] Cymbella neogena | Appellations de Taxon | 12029 |
| [1203] Madotheca porella | Appellations de Taxon | 1203 |
| [12030] Cymbellonitzschia hossamedinii | Appellations de Taxon | 12030 |
| [12031] Cymbellonitzschia diluviana | Appellations de Taxon | 12031 |
| [12032] Caloneis nipponica | Appellations de Taxon | 12032 |
| [12033] Craticula nonambigua | Appellations de Taxon | 12033 |
| [12034] Cymbella norvegica var. linearis | Appellations de Taxon | 12034 |
| [12035] Cymbella nipponica | Appellations de Taxon | 12035 |
| [12036] Cymbella neoleptoceros var. tenuistriata | Appellations de Taxon | 12036 |
| [12037] Cymbella obtusiformis | Appellations de Taxon | 12037 |
| [12038] Cymbopleura oblongata var. oblongata | Appellations de Taxon | 12038 |
| [12039] Coscinodiscus biangulatus | Appellations de Taxon | 12039 |
| [1204] Porella | Appellations de Taxon | 1204 |
| [12040] Coscinodiscus oblongus | Appellations de Taxon | 12040 |
| [12041] Cocconeis costata | Appellations de Taxon | 12041 |
| [12042] Cocconeis costata var. hexagona | Appellations de Taxon | 12042 |
| [12043] Coscinodiscus excentricus | Appellations de Taxon | 12043 |
| [12044] Cocconeis fasciolata | Appellations de Taxon | 12044 |
| [12045] Cocconeis finnmarchica | Appellations de Taxon | 12045 |
| [12046] Cocconeis fluminensis | Appellations de Taxon | 12046 |
| [12047] Cocconeis fraudulens | Appellations de Taxon | 12047 |
| [12048] Cocconeis grata | Appellations de Taxon | 12048 |
| [12049] Cocconeis hauniensis | Appellations de Taxon | 12049 |
| [1205] Porella platyphylla | Appellations de Taxon | 1205 |
| [12050] Cocconeis heteroidea | Appellations de Taxon | 12050 |
| [12051] Cocconeis clandestina | Appellations de Taxon | 12051 |