| [20072] Chondrosphaera | Appellations de Taxon | 20072 |
| [20073] Chondrosphaera lapponica | Appellations de Taxon | 20073 |
| [20074] Choricystis | Appellations de Taxon | 20074 |
| [20075] Choricystis chodatii | Appellations de Taxon | 20075 |
| [20076] Choricystis coccoides | Appellations de Taxon | 20076 |
| [20077] Chromulina erkensis | Appellations de Taxon | 20077 |
| [20078] Chroococcus distans | Appellations de Taxon | 20078 |
| [20079] Chrysastrella | Appellations de Taxon | 20079 |
| [2008] Cephalaspidomorphi | Appellations de Taxon | 2008 |
| [20080] Chrysastrella furcata | Appellations de Taxon | 20080 |
| [20081] Chrysolykos angulatus | Appellations de Taxon | 20081 |
| [20082] Chrysolykos skujae | Appellations de Taxon | 20082 |
| [20083] Chrysosphaerella | Appellations de Taxon | 20083 |
| [20084] Chrysosphaerella conradii | Appellations de Taxon | 20084 |
| [20085] Cladomonas | Appellations de Taxon | 20085 |
| [20086] Cladomonas fruticulosa | Appellations de Taxon | 20086 |
| [20087] Closterium acerosum var. lanceolatum | Appellations de Taxon | 20087 |
| [20088] Closterium acutum var. latius | Appellations de Taxon | 20088 |
| [20089] Closterium lanceolatum var. parvum | Appellations de Taxon | 20089 |
| [2009] Petromyzontidae | Appellations de Taxon | 2009 |
| [20090] Closterium venus var. westii | Appellations de Taxon | 20090 |
| [20091] Coenochloris hindakii | Appellations de Taxon | 20091 |
| [20092] Coenochloris planoconvexa | Appellations de Taxon | 20092 |
| [20093] Coenochloris pyrenoidosa var. minor | Appellations de Taxon | 20093 |
| [20094] Coenocystis obtusa | Appellations de Taxon | 20094 |
| [20095] Coenocystis planctonica var. hercynica | Appellations de Taxon | 20095 |
| [20096] Cosmarium abbreviatum var. minus | Appellations de Taxon | 20096 |
| [20097] Cosmarium blyttii var. novae-sylvae | Appellations de Taxon | 20097 |
| [20098] Cosmarium gibberulum | Appellations de Taxon | 20098 |
| [20099] Cosmarium polygonum | Appellations de Taxon | 20099 |
| [201] Agraylea | Appellations de Taxon | 201 |
| [2010] Lampetra | Appellations de Taxon | 2010 |
| [20100] Cosmarium polygonum var. hexagonum | Appellations de Taxon | 20100 |
| [20101] Cosmarium pseudoornatum | Appellations de Taxon | 20101 |
| [20102] Cosmarium quadratulum | Appellations de Taxon | 20102 |
| [20103] Cosmarium skujae | Appellations de Taxon | 20103 |
| [20104] Cosmarium staurastroides | Appellations de Taxon | 20104 |
| [20105] Cosmarium subcostatum var. minus | Appellations de Taxon | 20105 |
| [20106] Cosmarium subgranatum | Appellations de Taxon | 20106 |
| [20107] Cosmarium subprotumidum var. gregorii | Appellations de Taxon | 20107 |
| [20108] Cosmarium tinctum var. intermedium | Appellations de Taxon | 20108 |
| [20109] Cosmarium tumidum | Appellations de Taxon | 20109 |
| [2011] Lampetra fluviatilis | Appellations de Taxon | 2011 |
| [20110] Cosmarium venustum var. minus | Appellations de Taxon | 20110 |
| [20111] Cosmarium vogesiacum var. alpinum | Appellations de Taxon | 20111 |
| [20112] Crucigeniella lunaris | Appellations de Taxon | 20112 |
| [20113] Cryptomonas brevis | Appellations de Taxon | 20113 |
| [20114] Cryptomonas obovoidea | Appellations de Taxon | 20114 |
| [20115] Cryptomonas pyrenoidifera | Appellations de Taxon | 20115 |
| [20116] Cyanobium | Appellations de Taxon | 20116 |