Family A

• family acanthaceae • family acanthisittidae • family acanthuridae • family acaridae • family accipitridae • family aceraceae • family acipenseridae • family acrididae • family actinidiaceae • family actinomycetaceae • family adelgidae • family adiantaceae • family aegypiidae • family aepyornidae • family agamidae • family agaricaceae • family agavaceae • family agonidae • family ailuropodidae • family aizoaceae • family akeridae • family alaudidae • family albuginaceae • family albulidae • family alcedinidae • family alcidae • family aleyrodidae • family alismataceae • family alliaceae • family alligatoridae • family allioniaceae • family aloeaceae • family alopiidae • family alstroemeriaceae • family amaranthaceae • family amaryllidaceae • family ambrosiaceae • family ambystomatidae • family ameiuridae • family amiidae • family ammodytidae • family amphioxidae • family amphisbaenidae • family amphiumidae • family amygdalaceae • family anabantidae • family anacardiaceae • family anarhichadidae • family anatidae • family ancylidae • family ancylostomatidae • family andrenidae • family anguidae • family anguillidae • family anhimidae • family anhingidae • family anniellidae • family annonaceae • family anobiidae • family anomalopidae • family anomiidae • family antedonidae • family antennariidae • family anthocerotaceae • family antilocapridae • family aphididae • family aphyllanthaceae • family apiaceae • family apidae • family aplodontiidae • family aplysiidae • family apocynaceae • family apodidae • family apogonidae • family apterygidae • family aquifoliaceae • family araceae • family araliaceae • family araucariaceae • family arcellidae • family arcidae • family arctiidae • family ardeidae • family arecaceae • family argasidae • family argentinidae • family argiopidae • family argonautidae • family ariidae • family aristolochiaceae • family armadillidiidae • family artamidae • family ascaphidae • family ascaridae • family asclepiadaceae • family asilidae • family asparagaceae • family aspergillaceae • family asphodelaceae • family aspleniaceae • family astacidae • family asteraceae • family atherinidae • family athiorhodaceae • family athyriaceae • family atrichornithidae • family atropidae • family aulostomidae • family auriculariaceae • family avicenniaceae • family azollaceae