Amblyomma cajennense 
Amblyomma tholloni 
American dog tick 
American House Spider 
American Nursery Web Spider 
Amyciaea lineatipes 
Ananteris platnicki 
Anarrhotus fossulatus 
Anasaitis canosa 
Ancylometes rufus 
Anelasmocephalus cambridgei 
Anelosimus vittatus 
Anepsion depressum 
Anepsion maritatum 
Angaeus rhombifer 
Antilles pinktoe tarantula 
Antmimic Spider 
Antrodiaetus pacificus 
Anyphaena aperta 
Aphantaulax signicollis 
Arabesque orbweaver 
Arabian fat-tailed scorpion 
Araneus ginninderranus 
Araneus nox