Abelisaurus
Abrictosaurus
Acanthoceras
Acanthodii
Acantholipan
Acanthonemus
Acanthopholis
Acanthostega
Aceratherium
Achelousaurus
Acrocanthosaurus
Acrophoca
Acrotholus
Actinocrinus
Aculea
Adasaurus
Adjiderebos
Aegasteroceras
Aeger
Aegirocassis
Aegoceras
Aellopos
Aepycamelus
Aepyornis
Aetomylaeus
Afrovenator
Agathaumas
Agilisaurus
Agujaceratops
Agustinia
Ainoceras
Aipichthys
Ajkaceratops
Alamosaurus
Alanqa
Albertia
Albertaceratops
Albertonectes
Albertosaurus
Alectrosaurus
Alethopteris
Algoasaurus
Alioramus
Allosaurus
Alosa
Alphadon
Altirhinus
Altispinax
Alvarezsaurus
Alxasaurus
Amaltheus
Amargasaurus
Amber
Ambulocetus
Amebelodon
Amia
Ammonite
Ampelosaurus
Amphicyonidae
Amphistium
Anadara
Anancus
Anatosaurus
Anatosuchus
Anchiceratops
Anchiornis
Anchisaurus
Ancycloceras
Ancyloceras
Ancylotherium
Andalusiana
Andesaurus
Andrewsarchus
Andrias
Androgynoceras
Angaturama
Angolosaurus
Anguilla
Angustinaripterus
Anhanguera
Ankylosaurus
Anolcites
Anomalocaris
Antarctopelta
Antarctosaurus
Anthracotherium
Antrodemus
Anurognathus
Anzu
Apatosaurus
Appalachiosaurus
Apterornis
Aquilolamna
Aquilops
Aragosaurus
Aralosaurus
Arambourgiania
Araripesuchus
Araucaria
Araucarioxylon
Archaeamphora
Archaeoceratops
Archaeocyathus
Archaeohyrax
Archaeopteris
Archaeopteryx
Archaeornithomimus
Archaeotrogon
Archaeteuthis
Archegosaurus
Archelon
Archidiskodon
Arctodus
Arctostrea
Arctotherium
Ardipithecus
Argentavis
Argentinosaurus
Argillochelys
Argyrolagus
Arietites
Arizonasaurus
Armigatus
Arrhinoceratops
Arsinoitherium
Arthropleura
Artigasia
Asaphus
Askeptosaurus
Aspidorhynchus
Asteroceras
Asterolepis
Asterotheca meriani
Astrapotherium
Astraspis
Astrodon
Ataxioceras
Ateleaspis
Athleta
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
Belemnoidea
Belemnopsis
Belonostomus
Berbericeras
Berycopsis
Beryx
Besanosaurus
Bibio
Bonatitan
Birbalsahnia
Bison
Bistahieversor
Boreaspis
Borhyaena
Borophagus
Bos
Bothriolepis
Bothriospondylus
Botryopteris
Brachauchenius
Brachiosaurus
Brachyceratops
Brachylophosaurus
Brachylophus
Bradysaurus
Bramatherium
Branchiosaurus
Brasilotitan
Breviceratops
Brontops
Brontornis
Brontosaurus
Brontotherium
Buchiceras
Byronosaurus
Cacops
Cadomites
Caiuajara
Calamites
Calcinoplax
Calliphylloceras
Callipteryx
Calycoceras
Calymene
Cambropallas
Cameroceras
Campanile
Camptosaurus
Campylognathoides
Campyloprion
Canaanimys
Canis
Capromeryx
Carangopsis
Carcharocles
Carcharodontosaurus
Caretta
Caribemys
Carnotaurus
Carnufex
Carolicrinus
Cassiope
Castoroides
Catacoeloceras
Cathayornis
Caturus
Caudipteryx
Caulkicephalus
Caupedactylus
Caviramus
Cearadactylus
Centrosaurus
Cephalaspis
Ceratarges
Ceratites
Ceratodus
Ceratogaulus
Ceratoichthys
Ceratops
Ceratosaurus
Ceresiosaurus
Cetiosaurus
Cetotherium
Chaetodon
Chalicotherium
Champsosaurus
Changyuraptor
Charniodiscus
Chasmaporthetes
Chasmatosaurus
Chasmosaurus
Cheirolepis
Cheirurus
Cheloniceras
Chelychelynechen
Chialingosaurus
Chilantaisaurus
Chindesaurus
Chirostenotes
Chirotherium
Chlamydoselache
Chlamys
Chondrosteosaurus
Chriacus
Chunia
Citipati
Cladophlebis
Cladoselache
Clambites
Claosaurus
Cleoniceras
Clidastes
Climatius
Clinocardium
Cloudina
Clupea
Coahuilaceratops
Cobitis
Coccosteus
Coelacanthus
Coelodonta
Coelophysis
Coelurosauravus
Coelurus
Collignoniceras
Colombiceras
Colpocoryphe
Comodactylus
Compsognathus
Comptonia
Confuciusornis
Coosella
Copepteryx
Cordulagomphus
Coronocephalus
Coryphodon
Corythoraptor
Corythosaurus
Craspedites
Crassigyrinus
Cretolamna
Cretoxyrhina
Cricosaurus
Crioceratites
Criorhynchus
Crocodylus
Crocuta
Crossognathus
Crotalocephalus
Cryolophosaurus
Cryptoclidus
Ctenis
Ctenocephalus
Ctenochasma
Ctenurella
Cucullaea
Cunningtoniceras
Cuvieronius
Cybium
Cycadopteris
Cyclopoma
Cyclurus
Cymbospondylus
Cynognathus
Cypretherium
Cyrtograptus
