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WikiPedia: Bipes biporus http://mexico-herps.com/Baja/Bipes_biporus.jpg http://reptile-database.reptarium.cz/species?genus... http://www.embl-heidelberg.de/~uetz/families/Biped... http://animaldiversity.ummz.umich.edu/site/account... http://animaldiversity.ummz.umich.edu/site/account... http://biology.uta.edu/herpetology/bipes/Cap0009.m... http://biology.uta.edu/herpetology/index.html http://www.itis.gov/servlet/SingleRpt/SingleRpt?se... http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwta... http://www.archive.org/details/americannatural40in...