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WikiPedia: So http://www.horseshoecrab.org/nh/species.html http://www.iucnredlist.org http://www.iucnredlist.org/details/3856/0 http://www.iucnredlist.org/search/details.php/3856... http://mangrove.nus.edu.sg/guidebooks/text/2076.ht... http://www.maivietbio.com.vn/print.php?id=139&t=n