Since there are species of legless lizards, what parameters do scientists use to not classify them as snakes?

Question

I saw this video about a legless lizard that, if I had seen it in the wild, I probably would have thought it was a snake. How do scientists know how to tell the difference?

In: 279

Answer 1

I believe lizards have earholes whilst snakes do not ( among many other differences) from what I remember from biology.