(Serpentes: Viperidae) - compiled by Van Wallach
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Head drawings: genus
Ophryacus(Serpentes: Viperidae) - compiled by Van Wallach
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 | Ophryacus smaragdinus (from Grünwald & al. 2015) |
 | Ophryacus sphenophrys (from Grünwald & al. 2015) |
 | Ophryacus undulatus (from Campbell & Lamar 2004) |
 | Ophryacus undulatus (from Canseco-Márquez & al. 2010) |
 | Ophryacus undulatus (from Heimes 2016) |
 | Ophryacus undulatus (from Ramírez-Bautista & al. 2014) |
 | Ophryacus undulatus (from Campbell & Lamar 1989) |
 | Ophryacus undulatus (from Campbell & Lamar 1989) |
 | Ophryacus undulatus (from Campbell & Lamar 1989) |