Abelisaurus
Abrictosaurus
Acanthoceras
Acanthodii
Acantholipan
Acanthonemus
Acanthopholis
Acanthostega
Aceratherium
Achelousaurus
Acrocanthosaurus
Acrodus
Acrophoca
Acrotholus
Actaeonella
Actinocrinus
Aculea
Adasaurus
Adinotherium
Adjiderebos
Aegasteroceras
Aeger
Aegirocassis
Aegoceras
Aellopos
Aepycamelus
Aepyornis
Aethophyllum
Aetomylaeus
Afrovenator
Agassiceras
Agathaumas
Agilisaurus
Agriochoerus
Agujaceratops
Agustinia
Ainoceras
Aipichthys
Aivukus
Ajkaceratops
Alamosaurus
Alanqa
Albertia
Albertaceratops
Albertonectes
Albertosaurus
Alectrosaurus
Alethopteris
Algoasaurus
Alioramus
Allodesmus
Allosaurus
Alosa
Alphadon
Altirhinus
Altispinax
Alvarezsaurus
Alxasaurus
Amaltheus
Amargasaurus
Amber
Ambulocetus
Amebelodon
Amia
Amiskwia
Ammonite
Ammosaurus
Ampelosaurus
Amphicyonidae
Amphistium
Anadara
Anancus
Anatosaurus
Anatosuchus
Anchiceratops
Anchiornis
Anchisaurus
Ancyloceras
Ancylotherium
Andalusiana
Andesaurus
Andrewsarchus
Andrias
Androgynoceras
Angaturama
Angolosaurus
Anguilla
Angustinaripterus
Anhanguera
Ankylosaurus
Anolcites
Anomalocaris
Anoplotherium
Anserimimus
Antarctopelta
Antarctosaurus
Anthracotherium
Antrodemus
Anurognathus
Anzu
Apatosaurus
Appalachiosaurus
Apterornis
Aquilolamna
Aquilops
Aragosaurus
Aralosaurus
Arambourgiania
Araripesuchus
Araucaria
Araucarioxylon
Archaeamphora
Archaeanthus
Archaeoceratops
Archaeocyathus
Archaeohyrax
Archaeopteris
Archaeopteryx
Archaeornithomimus
Archaeotherium
Archaeothyris
Archaeotrogon
Archaeteuthis
Archegosaurus
Archelon
Archidiskodon
Arctodus
Arctostrea
Arctotherium
Ardeosaurus
Ardipithecus
Argentavis
Argentinosaurus
Argillochelys
Argyrolagus
Arietites
Arizonasaurus
Armenocerithium
Armigatus
Arrhinoceratops
Arsinoitherium
Arthropleura
Artigasia
Asaphus
Askeptosaurus
Aspidorhynchus
Asplenium
Asteroceras
Asterolepis
Asterophyllites
Asterotheca meriani
Astrapotherium
Astraspis
Astrodon
Ataxioceras
Ateleaspis
Athleta
Athlopecten
Atlanticopristis
Atlascopcosaurus
Atopodentatus
Atractosteus
Atrociraptor
Aturia
Aublysodon
Aucasaurus
Aucellina
Aulacopleura
Aurornis
Australopithecus
Australovenator
Austroraptor
Avaceratops
Avimimus
Aysheaia
Azhdarcho
Bactrosaurus
Baculites
Baeomorpha
Bagaceratops
Baguatherium
Bahariasaurus
Bajadasaurus
Bakonydraco
Balaur
Baluchitherium
Bambiraptor
Bananogmius
Barapasaurus
Barosaurus
Barrandeocrinus
Baryonyx
Basilosaurus
Batrachognathus
Baurusuchus
Bauxitornis
Beipiaosaurus
Belantsea
Belemnoidea
Belemnopsis
Bellerophon
Belonostomus
Berbericeras
Berycopsis
Beryx
Besanosaurus
Bibio
Bonatitan
Birbalsahnia
Bison
Bistahieversor
Boreaspis
Borhyaena
Borophagus
Bos
Bothriocidaris
Bothriolepis
Bothriospondylus
Botryopteris
Brachauchenius
Brachiosaurus
Brachyceratops
Brachylophosaurus
Brachylophus
Bradysaurus
Bramatherium
Branchiosaurus
Branisella
Brasilotitan
Breviceratops
Brontops
Brontornis
Brontosaurus
Brontotherium
Buchiceras
Byronosaurus
Cacops
Cadomites
Cainotherium
Caiuajara
Calamites
Calceola
Calcinoplax
Calliphylloceras
Callipteryx
Callipurbeckia
Calycoceras
Calymene
Camarasaurus
Cambropallas
Cameroceras
Campanile
Camptosaurus
Campylognathoides
Campyloprion
Canaanimys
Canis
Capromeryx
Carangopsis
Carcharocles
Carcharodon
Carcharodontosaurus
Caretta
Caribemys
Carnotaurus
Carnufex
Carolicrinus
Casea
Cassiope
Castoroides
Catacoeloceras
Cathayornis
Caturus
Caudipteryx
Caulkicephalus
Caupedactylus
Caviramus
Cearadactylus
Centrophorus
Centrosaurus
Cephalaspis
Ceratarges
Ceratites
Ceratodus
Ceratogaulus
Ceratoichthys
Ceratops
Ceratosaurus
Ceresiosaurus
Cetiosaurus
Cetotherium
Chaetodon
Chalicotherium
Champsosaurus
Changyuraptor
Charniodiscus
Chasmaporthetes
Chasmatosaurus
Chasmops
Chasmosaurus
Cheirolepis
Cheirurus
Cheloniceras
Chelychelynechen
Chialingosaurus
Chilantaisaurus
Chindesaurus
Chirostenotes
Chirotherium
Chlamydoselache
Chlamys
Chondrosteosaurus
Choristoceras
Chriacus
Chunia
Citipati
Cladophlebis
Cladoselache
Clambites
Claosaurus
Claudiosaurus
Cleoniceras
Clidastes
Climatius
Clinocardium
Cloudina
Clupea
Clymenia
Coahuilaceratops
Cobelodus
Cobitis
Coccosteus
Coelacanthus
Coelodonta
Coelophysis
Coelurosauravus
Coelurus
Collignoniceras
Coloborhynchus
Colombiceras
Colpocoryphe
Comodactylus
Compsognathus
Comptonia
Conchidium
Conchoraptor
Confuciusornis
Cooksonia
Coosella
Copepteryx
Cordaites
Cordulagomphus
Coronocephalus
Coryphodon
Corythoraptor
Corythosaurus
Cotylorhynchus
Craspedites
Crassigyrinus
Cretolamna
Cretoxyrhina
Cricocosmia
Cricosaurus
Crioceratites
Criorhynchus
Crocodylus
Crocuta
Cronopio
Crossognathus
Crotalocephalus
Cryolophosaurus
Cryptoclidus
Cryptornis
Ctenacanthus
Ctenis
Ctenocephalus
Ctenochasma
Ctenothrissa
Ctenurella
Cucullaea
Cunningtoniceras
Cuvieronius
Cybeloides
Cybium
Cycadopteris
Cyclarthrus
Cyclobatis
Cyclopoma
Cyclurus
Cymbospondylus
Cynognathus
Cypretherium
Cyrtograptus
