| A (39 species) |
| Abrictosaurus - Early Jurassic, 199-196 Ma |
| Acanthopholis - Early Cretaceous |
| Achelousaurus - Late Cretaceous, 74.2 Ma |
| Acristavus - Late Cretaceous, 79 Ma |
| Acrotholus - Late Cretaceous, 84-83.5 Ma |
| Agathaumas - Late Cretaceous, 66 Ma |
| Agilisaurus - Middle Jurassic, 168-161 Ma |
| Agujaceratops - Late Cretaceous, 77 Ma |
| Ahshislepelta - Late Cretaceous, Campanian |
| Ajkaceratops - Late Cretaceous, Santonian |
| Alaskacephale - Late Campanian, 80-69 Ma |
| Albalophosaurus - Early Cretaceous |
| Albertaceratops - Late Cretaceous, 77.5 Ma |
| Albertadromeus - Late Cretaceous |
| Alcovasaurus - Late Jurassic, 150 Ma |
| Aletopelta - Campanian |
| Alocodon - Unavailable |
| Altirhinus - Early Cretaceous |
| Amtocephale - Late Cretaceous, 84.5-83.5 Ma |
| Amurosaurus - Late Cretaceous, 70-66 Ma |
| Anabisetia - Late Cretaceous, 95-92 Ma |
| Anasazisaurus - Late Cretaceous, 74 Ma |
| Anchiceratops - Late Cretaceous, 72-71 Ma |
| Angulomastacator - Late Cretaceous, 76.9 Ma |
| Animantarx - 104.46-98.37 Ma |
| Ankylosaurus - Late Cretaceous, 68 Ma |
| Anodontosaurus - Late Cretaceous, 72.8-67 Ma |
| Anoplosaurus - Early Cretaceous, 100 Ma |
| Antarctopelta - Late Cretaceous, 74-70 Ma |
| Aquilops - Early Cretaceous, 107 Ma |
| Aralosaurus - Late Cretaceous, 85.8 Ma |
| Archaeoceratops - Early Cretaceous, 125 Ma |
| Arenysaurus - Late Cretaceous, 66 Ma |
| Arrhinoceratops - Early Maastrichtian, 70.6-70 Ma |
| Asiaceratops - Late Cretaceous, 99 Ma |
| Atlascopcosaurus - Early Cretaceous,[1]114 Ma |
| Augustynolophus - Late Cretaceous, 70 Ma |
| Auroraceratops - Early Cretaceous, Aptian |
| Avaceratops - Late Cretaceous, 77 Ma |
| B (13 species) |
| Bactrosaurus - Late Cretaceous, 70 Ma |
| Bagaceratops - Late Cretaceous, 80 Ma |
| Bainoceratops - Unavailable |
| Barilium - Early Cretaceous, 140 Ma |
| Barsboldia - Late Cretaceous, 70 Ma |
| Batyrosaurus - Late Cretaceous |
| Bienosaurus - Early Jurassic |
| Bihariosaurus - Berriasian of the Cretaceous |
| Blasisaurus - Late Cretaceous, 66 Ma |
| Bolong - Early Cretaceous, 125 Ma |
| Brachyceratops - Late Cretaceous, 74.5 Ma |
| Brachylophosaurus - Late Cretaceous, 78 Ma |
| Breviceratops - Unavailable |
| C (20 species) |
| Callovosaurus - Middle Jurassic, approximately 163 Ma |
| Camptosaurus - Late Jurassic |
| Cedarpelta - Early Cretaceous, 116-109 Ma |
| Cedrorestes - Early Cretaceous, Barremian |
| Centrosaurus - Late Cretaceous, 76.5-75.5 Ma |
| Cerasinops - Late Cretaceous |
| Chaoyangsaurus - Late Jurassic, 148 Ma |
| Charonosaurus - Late Cretaceous, 66 Ma |
| Chasmosaurus - Late Cretaceous, 76.5-75.5 Ma |
| Chialingosaurus - 160 Ma |
| Chungkingosaurus - 160 Ma |
| Cionodon - Late Cretaceous, 66 Ma |
| Claosaurus - Late Cretaceous, 87-82 Ma |
| Coahuilaceratops - Late Cretaceous, 72.5-71.4 Ma |
| Colepiocephale - Late Cretaceous, 80-77.5 Ma |
| Corythosaurus - Late Cretaceous, 77-75.7 Ma |
| Craspedodon - 85 Ma |
| Crichtonsaurus - Late Cretaceous, Cenomanian-Turonian |
| Cryptosaurus - Late Jurassic |
| Cumnoria - Upper Jurassic, Kimmeridgian |
| D (11 species) |
| Dacentrurus - Late Jurassic, 154-150 Ma |
| Dakotadon - Early Cretaceous, Barremian |
| Delapparentia - 130-127 Ma |
| Diabloceratops - Late Cretaceous, 79.9 Ma |
| Dongyangopelta - Cretaceous, 113-93.9 Ma |
| Draconyx - Late Jurassic, Tithonian |
| Dracopelta - Unavailable |
| Dracorex - Late Cretaceous, 66 Ma |
| Drinker - Late Jurassic |
| Dryosaurus - Late Jurassic, 155-145 Ma |
| Dyoplosaurus - Late Cretaceous, 76.5 Ma |
| E (12 species) |
| Echinodon - Early Cretaceous, 140 Ma |
| Edmontonia - Late Cretaceous, 76.5-69 Ma |
| Einiosaurus - Upper Cretaceous, 74.5-74 Ma |
| Elrhazosaurus - Early Cretaceous, approximately 115 Ma |
| Emausaurus - Early Jurassic, Toarcian |
| Eocursor - Late Triassic or Early Jurassic |
| Eolambia - Late Cretaceous, 96.7 Ma |
| Eotrachodon - Late Cretaceous, 86-83.6 Ma |
| Eotriceratops - Late Cretaceous, 68-67.6 Ma |
| Eousdryosaurus - Late Jurassic, 152 Ma |
| Equijubus - Early Cretaceous, 125 Ma |
| Euoplocephalus - Late Cretaceous, 76.4-75.6 Ma |
| F (5 species) |
| Fabrosaurus - Early Jurassic, 199-189 Ma |
| Ferganocephale - Middle Jurassic, 162 Ma |
| Fruitadens - Late Jurassic, 150 Ma |
| Fukuisaurus - Early Cretaceous, Barremian |
| Fulgurotherium - Early Cretaceous |
| G (14 species) |
| Gargoyleosaurus - Late Jurassic, 154-150 Ma |
| Gasparinisaura - 85 Ma |
| Gastonia - Early Cretaceous, 126 Ma |
| Geranosaurus - Early Jurassic |
| Gigantspinosaurus - Late Jurassic |
| Gilmoreosaurus - Early - Late Cretaceous, 70 Ma |
| Glishades - Late Cretaceous, 74.5 Ma |
| Gobiceratops - Late Cretaceous |
| Gobisaurus - Late Cretaceous, 92 Ma |
| Gongbusaurus - Late Jurassic, 160-157 Ma |
| Goyocephale - Late Cretaceous, 76 Ma |
| Graciliceratops - Late Cretaceous, 90 Ma |
| Gryphoceratops - Late Cretaceous, 83.5 Ma |
| Gryposaurus - Late Cretaceous, 83-74 Ma |
| H (16 species) |
| Hadrosaurus - Late Cretaceous, 79.5 Ma |
| Hanssuesia - Late Cretaceous, 77.5-75 Ma |
| Helioceratops - Middle Cretaceous |
| Hesperosaurus - Late Jurassic, 156 Ma |
| Heterodontosaurus - Early Jurassic, 200-190 Ma |
| Hexinlusaurus - Middle Jurassic, Bajocian |
| Hippodraco - Early Cretaceous, 124 Ma |
| Homalocephale - Late Cretaceous, 80 Ma |
| Hoplitosaurus - Early Cretaceous, 130 Ma |
| Horshamosaurus - Barremian Cretaceous |
| Huayangosaurus - Middle Jurassic, 165 Ma |
| Huehuecanauhtlus - Late Cretaceous, Santonian |
| Hungarosaurus - Late Cretaceous, 85 Ma |
| Hylaeosaurus - Early Cretaceous, 140-136 Ma |
| Hypacrosaurus - Late Cretaceous, 75-67 Ma |
| Hypselospinus - Early Cretaceous, 140 Ma |
| I (2 species) |
| Iguanacolossus - Lower Cretaceous, 130 Ma |
| Iguanodon - Early Cretaceous, 126-125 Ma |
| J (6 species) |
| Jaxartosaurus - Late Cretaceous, 84 Ma |
| Jeholosaurus - Early Cretaceous, 130 Ma |
| Jeyawati - Late Cretaceous, 91 Ma |
| Jiangjunosaurus - Late Jurassic, 160 Ma |
| Jintasaurus - Early Cretaceous |
| Judiceratops - Late Cretaceous, 78-77.5 Ma |
| K (12 species) |
| Kangnasaurus - Early Cretaceous |
| Kentrosaurus - Late Jurassic, 155-150 Ma |
| Kerberosaurus - Late Cretaceous, 66 Ma |
| Koreaceratops - Early Cretaceous, 103 Ma |
| Koreanosaurus - Late Cretaceous, Santonian-Campanian |
| Koshisaurus - Early Cretaceous, 128 Ma |
| Kosmoceratops - Late Cretaceous, 76.4-75.9 Ma |
| Kritosaurus - Late Cretaceous, 74.5 Ma |
| Kukufeldia - Early Cretaceous, 140-136 Ma |
| Kulceratops - Early Cretaceous, Albian |
| Kulindadromeus - Middle Jurassic to Late Jurassic, 169-144 Ma |
| Kundurosaurus - Late Cretaceous, 67 Ma |
| L (17 species) |
| Lamaceratops - Late Cretaceous |
| Lambeosaurus - Late Cretaceous, 76-75 Ma |
| Laosaurus - Upper Jurassic, Upper Cretaceous |
| Lapampasaurus - Late Cretaceous, 76-70 Ma |
| Laquintasaura - 200.91 Ma Hettangian |
| Latirhinus - Late Cretaceous, 72.5 Ma |
| Leaellynasaura - Early Cretaceous,[1]118-110 Ma |
| Leptoceratops - Late Cretaceous, 66.8 Ma |
| Lesothosaurus - Early Jurassic, 199-189 Ma |
| Levnesovia - Late Cretaceous |
| Lexovisaurus - Middle - Late Jurassic, 164.7 Ma |
| Liaoceratops - Early Cretaceous, 130 Ma |
| Lophorhothon - Late Cretaceous, ~80 Ma |
| Loricatosaurus - Middle Jurassic |
| Lurdusaurus - Early Cretaceous, 121-112 Ma |
| Lusitanosaurus - Early Jurassic |
| Lycorhinus - Early Jurassic, 197 Ma |
| M (18 species) |
| Magnapaulia - Late Cretaceous, 73.6-73 Ma |
| Magnirostris - Unavailable |
| Maiasaura - Late Cretaceous, 76.7 Ma |
| Mandschurosaurus - Late Cretaceous, 66 Ma |
| Manidens - Middle Jurassic, 171-167 Ma |
| Mantellisaurus - Early Cretaceous, 125 Ma |
| Microceratus - Late Cretaceous, 90 Ma |
| Micropachycephalosaurus - Late Cretaceous, 69.5 Ma |
| Minmi - Early Cretaceous, 119-113 Ma |
| Minotaurasaurus - Late Cretaceous, 75-70 Ma |
| Miragaia - Late Jurassic, 150 Ma |
| Mochlodon - Late Cretaceous |
| Monkonosaurus - 150 Ma |
| Montanoceratops - 70 Ma Early Maastrichtian |
| Morelladon - Early Cretaceous, 130 Ma |
| Mosaiceratops - Late Cretaceous, 94-72 Ma |
| Muttaburrasaurus - Early Cretaceous,[1] 112-99.6 Ma |
| Mymoorapelta - Late Jurassic, 155-150 Ma |
| N (11 species) |
| Naashoibitosaurus - Late Cretaceous, 73 Ma |
| Nanningosaurus - Late Cretaceous, Maastrichtian |
| Nanosaurus - Unavailable |
| Nanyangosaurus - Late Cretaceous, 94-72 Ma |
| Nasutoceratops - Campanian, 75.9-75.5 Ma |
| Nedoceratops - Late Cretaceous, 67 Ma |
| Nipponosaurus - Late Cretaceous |
| Nodocephalosaurus - Late Cretaceous, Campanian |
| Nodosaurus - Late Cretaceous, 100.5-97 Ma |
| Notoceratops - Late Cretaceous |
| Notohypsilophodon - Late Cretaceous |
| O (9 species) |
| Ojoceratops - Late Cretaceous, 68 Ma |
| Olorotitan - Late Cretaceous, 72 Ma |
| Oohkotokia - Late Cretaceous, 74 Ma |
| Orodromeus - Late Cretaceous, 76.7 Ma |
| Oryctodromeus - Late Cretaceous, Cenomanian |
| Osmakasaurus - Early Cretaceous, 137 Ma |
| Othnielia - Late Jurassic, 150 Ma |
| Othnielosaurus - Late Jurassic, 155-148 Ma |
| Ouranosaurus - Early Cretaceous, 125-112 Ma |
| P (26 species) |
| Pachycephalosaurus - Late Cretaceous, 70 Ma |
| Pachyrhinosaurus - 73.5-69 Ma |
| Palaeoscincus - Upper Cretaceous |
| Panoplosaurus - Late Cretaceous, 76 Ma |
| Paranthodon - Early Cretaceous, 145.5-136.4 Ma |
| Pararhabdodon - Late Cretaceous, 67.5 Ma |
| Parasaurolophus - Late Cretaceous, 76.5-74.5 Ma |
| Parksosaurus - Late Cretaceous, 70 Ma |
| Pawpawsaurus - Early Cretaceous, 100 Ma |
| Pegomastax - Early Jurassic, 200-190 Ma |
| Penelopognathus - Early Cretaceous |
| Pentaceratops - Late Cretaceous, 75.79-73 Ma |
| Phyllodon - Late Jurassic |
| Pisanosaurus - Late Triassic, 228-216.5 Ma |
| Planicoxa - Early Cretaceous, 140-125 Ma |
| Platyceratops - Unavailable |
| Plesiohadros - Late Cretaceous, 80-75 Ma |
| Polacanthus - Early Cretaceous, 130-125 Ma |
| Prenocephale - Late Cretaceous, 80-75 Ma |
| Prenoceratops - Late Cretaceous 74.3 Ma |
| Probactrosaurus - Late Cretaceous, 96-88 Ma |
| Probrachylophosaurus - Late Cretaceous, 79 Ma |
| Prosaurolophus - Late Cretaceous, 75.5-74.0 Ma |
| Protoceratops - Late Cretaceous, 75-71 Ma |
| Protohadros - Late Cretaceous, 95 Ma |
| Psittacosaurus - Early Cretaceous, 126-101 Ma |
| Q (1 species) |
| Qantassaurus - Early Cretaceous |
| R (4 species) |
| Ratchasimasaurus - Early Cretaceous, Aptian |
| Regaliceratops - Late Cretaceous, 68.5-67.5 Ma |
| Regnosaurus - Early Cretaceous |
| Rhabdodon - Late Cretaceous, 70 Ma |
| S (23 species) |
| Sahaliyania - Late Cretaceous, 68 Ma |
| Saichania - Late Cretaceous, 75-70 Ma |
| Sarcolestes - Late Jurassic, 165 Ma |
| Saurolophus - Maastrichtian, 70-68.5 Ma |
| Sauropelta - Early Cretaceous, 108.5 Ma |
| Scelidosaurus - Early Jurassic, 196.5-183 Ma |
| Scolosaurus - Late Cretaceous, 76.5 Ma |
| Scutellosaurus - Early Jurassic, 196 Ma |
| Secernosaurus - Late Cretaceous, Maastrichtian |
| Serendipaceratops - Early Cretaceous |
| Shamosaurus - Early Cretaceous, Aptian-Albian |
| Shantungosaurus - Late Cretaceous, Middle to Late Campanian |
| Shanxia - Late Cretaceous |
| Siamodon - Early Cretaceous, Aptian |
| Silvisaurus - Late Cretaceous, 96-93.5 Ma |
| Sinoceratops - Late Cretaceous, 72 Ma |
| Spinops - Late Cretaceous, 76.5 Ma |
| Stegoceras - Late Cretaceous, 77.5-74 Ma |
| Stegosaurus - Late Jurassic, 155-150 Ma |
| Stormbergia - Early Jurassic, 199-189 Ma |
| Struthiosaurus - Late Cretaceous, 85 Ma |
| Stygimoloch - Late Maastrichtian, 66 Ma |
| Styracosaurus - Late Cretaceous, 75.5-75 Ma |
| T (26 species) |
| Talenkauen - Late Cretaceous, 96.2 Ma |
| Tanius - Late Cretaceous, Campanian |
| Tarchia - Late Cretaceous, 75-70 Ma |
| Tatankacephalus - Early Cretaceous, 108.5 Ma |
| Tatankaceratops - Late Maastrichtian, 66 Ma |
| Tatisaurus - Early Jurassic, Sinemurian |
| Taveirosaurus - Late Cretaceous |
| Telmatosaurus - Late Cretaceous, 70 Ma |
| Tethyshadros - Late Cretaceous |
| Texacephale - Late Campanian, 77 Ma |
| Texasetes - Early Cretaceous, 100 Ma |
| Theiophytalia - Early Cretaceous, 112 Ma |
| Thescelosaurus - Late Cretaceous, 66 Ma |
| Tianchisaurus - Jurassic |
| Tianyulong - Late Jurassic, 158.5 Ma |
| Tianzhenosaurus - Late Cretaceous |
| Titanoceratops - Late Cretaceous, 74.73-73.55 Ma |
| Torosaurus - Late Cretaceous, 68 Ma |
| Triceratops - Late Cretaceous, 68 Ma |
| Trimucrodon - Late Jurassic |
| Trinisaura - Late Cretaceous, 80 Ma |
| Tsagantegia - Late Cretaceous, 90 Ma |
| Tsintaosaurus - Late Cretaceous, 70 Ma |
| Tuojiangosaurus - Late Jurassic, 160 Ma |
| Turanoceratops - Late Cretaceous, 90 Ma |
| Tylocephale - Late Campanian, 80-70 Ma |
| U (5 species) |
| Udanoceratops - Late Cretaceous, Campanian |
| Ugrunaaluk - Late Cretaceous, 69.2 Ma |
| Unescoceratops - Late Cretaceous, 76.5-75 Ma |
| Utahceratops - Late Cretaceous, 76.4-75.5 Ma |
| Uteodon - Upper Jurassic |
| V (3 species) |
| Vagaceratops - Late Cretaceous, 75 Ma |
| Valdosaurus - Early Cretaceous |
| Velafrons - Late Cretaceous, 72 Ma |
| W (5 species) |
| Wannanosaurus - Campanian, 80 Ma |
| Wendiceratops - Late Cretaceous, 79-78.7 Ma |
| Willinakaqe - Upper Cretaceous, Campanian-Maastrichtian |
| Wuerhosaurus - Early Cretaceous, uncertain |
| Wulagasaurus - Late Cretaceous, 69 Ma |
| X (4 species) |
| Xenoceratops - Late Cretaceous, 79.5 Ma |
| Xiaosaurus - Middle Jurassic |
| Xuanhuaceratops - Late Jurassic, 167.7-161.2 Ma |
| Xuwulong - Early Cretaceous, Aptian-Albian |
| Y (4 species) |
| Yamaceratops - Late Cretaceous |
| Yandusaurus - Middle Jurassic, Bathonian |
| Yinlong - Late Jurassic, 158 Ma |
| Yueosaurus - Cretaceous, Aptian-Cenomanian |
| Z (9 species) |
| Zalmoxes - 70 Ma |
| Zaraapelta - Late Cretaceous, 75-71 Ma |
| Zephyrosaurus - Early Cretaceous, Aptian-Albian |
| Zhanghenglong - Late Cretaceous, 85 Ma |
| Zhejiangosaurus - Late Cretaceous, 100.5-93.9 Ma |
| Zhuchengceratops - Upper Cretaceous, 70 Ma |
| Ziapelta - Campanian, 74.5-72.6 Ma |
| Zuniceratops - Late Cretaceous, 91 Ma |
| Zuoyunlong - Late Cretaceous, Cenomanian |