. . . "*Porthidium hyoprora" . . . . "Bothrops hyoprorus, or the Amazonian toad-headed pitviper, is a species of venomous snake in the Viperidae family. It is endemic to northwestern South America."@en . . . "(–Campbell& Lamar, 1989)" . . "(– Gutberlet & Campbell, 2001)" . . "*Bothrocophias hyoprora" .