Kainops
Kannemeyeria
Kansajsuchus
Kanuites
Kaolishania
Kaprosuchus
Karavankina
Keichousaurus
Kelenken
Kentisuchus
Kentrosaurus
Kettneraspis
Kimberella
Knightia
Kogaionon
Koolasuchus
Kosmoceras
Kritosaurus
Kronosaurus
Kryoryctes
Kryptodrakon
Kryptops
Kuehneosaurus
Kulindadromeus
Kyptoceras
Kyrgyzsaurus
Labidosaurus
Lacusovagus
Lagosuchus
Lambeosaurus
Lamprocyclas
Lancastria
Lates
Latimeria
Leaellynasaura
Leanchoilia
Lebachia
Leedsichtys
Leonaspis
Lepidosteus
Lepidotes
Lepterpeton
Leptictidium
Leptoceratops
Leptocleidus
Leptosphinctes
Lesothosaurus
Leuciscus
Lewesiceras
Lexovisaurus
Liaoningosaurus
Libanobythus
Liliensternus
Lingulella
Liopleurodon
Lithacoceras
Lituites
Livistonia
Livyatan
Lomatopteris
Longisquama
Lophosoria
Lotosaurus
Lourinhasaurus
Loxodonta
Luangwa
Lufengosaurus
Lukousaurus
Lunataspis
Luperosuchus
Lurdusaurus
Lycoptera
Lymnocardium
Lyriaspis
Lystrosaurus
Lytoceras
Lytodiscoides
Machairoceratops
Machairodus
Maclurites
Macrauchenia
Macromesodon
Macroplata
Magyarosaurus
Maiasaura
Majungatholus
Malawisaurus
Mallotus
Mamenchisaurus
Mammut
Mammuthus
Mandarina
Mandschurosaurus
Mantelliceras
Mantellisaurus
Mapusaurus
Marasuchus
Marrella
Masiakasaurus
Massospondylus
Mastodon
Mastodonsaurus
Mauisaurus
Mawsonia
Mayeria
Mcnamaraspis
Mediterraneatrigonia
Medusaceratops
Megacerops
Megaladapis
Megalania
Megalapteryx
Megaloceros
Megalocnus
Megalosaurus
Meganeura
Meganeuropsis
Megantereon
Megaraptor
Megatherium
Megazostrodon
Megistotherium
Mei
Meiolania
Mekosuchus
Melanorosaurus
Melongena
Menardella
Mene
Mercenaria
Mercuriceratops
Merychippus
Merychyus
Mesacanthus
Mesadactylus
Mesocetus
Mesodon
Mesolimulus
Mesonyx
Mesopithecus
Mesosaurus
Mestognathus
Metacrinus
Metamynodon
Metasequoia
Metaxytherium
Metoposaurus
Metridiochoerus
Metriorhynchus
Micraster
Micreschara
Microbrachis
Microceratodus
Microceratops
Microraptor
Microvenator
Mimosphinctes
Minmi
Miohippus
Mioplosus
Mixopterus
Mixosaurus
Moa
Moanasaurus
Mochlodon
Moeritherium
Mongolemys
Mongolotherium
Monoclonius
Monocyathus
Monolophosaurus
Mononykus
Montanoceratops
Morganucodon
Moropus
Mortoniceras
Mosasaurus
Moschops
Muraenosaurus
Mussaurus
Muttaburrasaurus
Muzquizopteryx
Myliobatis
Mylodon
Myophorella
Myotragus
Myripristis
Mysteroceras
Nanchangosaurus
Nanotyrannus
Nanshiungosaurus
Naosaurus
Naseus
Nassa
Nasutoceratops
Natunaornis
Nautiloid
Nedoceratops
Neithia
Nematonotus
Nemicopterus
Neogloboquadrina
Neovenator
Neptunea
Nerinea
Neseuretus
Nesodon
Neuquensaurus
Neuropteridium
Neuropteris
Neusticosaurus
Ninjemys
Nipponosaurus
Noasaurus
Nodosaurus
Nomingia
Noripterus
Nostoceras
Notelops
Nothosaurus
Nothrotheriops
Notofagus
Numidopleura
Nyasasaurus
Nyctosaurus
