Viperinae

**Definition:** A subfamily of snakes commonly known as true vipers or crotaline snakes in the family VIPERIDAE. They are distinguished from sister subfamily CROTALINAE or pit vipers by their lack the heat-sensing pit organs.

**Tree numbers:** - B01.050.050.286.875.875.875 - B01.050.150.900.833.672.125.937.875 - B01.050.150.900.833.672.562.875.875

**Synonyms:** - True Vipers