MeSH 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.;
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.