What specific dental structure defines Heterodon nasicus's placement in Family Colubridae?

Answer

Rear-fanged dentition

The placement within the Family Colubridae is significant because it is associated with specific physical traits, most notably the presence of rear-fanged dentition. This contrasts sharply with other dangerous snake families like Viperidae or Elapidae, which possess fixed, hollow fangs optimized specifically for efficient venom injection into a victim. While Colubrids like H. nasicus may have saliva that is mildly toxic to their natural prey, which consists of small amphibians and mammals, this dental arrangement and associated toxicity level generally render them not medically significant to humans. This structural detail of the teeth is a key differentiator within the snake taxonomy that dictates its predatory method.

What specific dental structure defines Heterodon nasicus's placement in Family Colubridae?
taxonomyanimalclassificationreptilesnake