Introduction
Abditomys, Abrawayaomys, Abrocoma, Acerodon, Acinonyx, Acomys, Aconaemys, Acrobates, Addax, Aepeomys, Aepyceros, Aepyprymnus, Aeretes, Aeromys, Aethalops, Aethomys, Agouti, Ailuropoda, Ailurops, Ailurus, Akodon, Alcelaphus, Alces, Alionycteris, Allactaga, Allactodipus, Allenopithecus, Allocebus, Allocricetulus, Alouatta, Alticola, Amblonyx, Amblyrhiza, Amblysomus, Ametrida , Ammodillus, Ammodorcas, Ammospermophilus, Ammotragus, Amorphochilus schnablii, Anathana, Andalgalomys, Andinomys, Anisomys, Anomalurus, Anonymomys, Anotomys, Anoura , Anourosorex, Antechinus, Anthops , Antidorcas, Antilocapra, Antilope, Antrozous, Aonyx, Aotus, Aplodontia, Apodemus, Apomys, Aproteles, Arborimus, Archboldomys, Arctictis, Arctocebus, Arctocephalus, Arctogalidia, Arctonyx, Ardops , Ariteus , Artibeus , Arvicanthis, Arvicola, Asellia , Aselliscus , Atelerix, Ateles, Atelocynus, Atherurus, Atilax, Atlantoxerus, Auliscomys, Avahi, Axis,