The most obvious difference between pythons and boas are that pythons lay eggs and boas give live birth. Yep, that’s right boas give birth to cute little baby boas. There are also physical differences between them. Pythons are found in the Old World (Asia, Africa, Australia) whereas boas are found in the New World (the Americas). Anacondas are boas and not their own sub family. They are both constrictors which means neither sub family is venomous and they kill prey by suffocating it with their muscular bodies.
Tuataras are not strictly speaking members of Squamata or lizards, as their vertebra have hollow ends and the skull has two bony arches like that of a crocodilian, whilst these features are not present in lizards. The Tuataras teeth are also fused into its jaw, males lack a penis and all Tuataras lack a visible outer ear or even a middle ear. The Tuataras heart is also the most primitive type found in living reptiles, and part of the structure of its brain is rather primitive as well. However, like a lizard, Tuataras can regenerate its tail and like other reptiles will shed its skin annually to allow for growth.
I can’t comment on exactly how the Tuatara is related to living reptiles, or if it is closer related to dinosaurs, birds, or species predating modern lizards and birds. I will research this though!
Milksnakes (Lampropeltis triangulum), are a species of Kingsnake. There are 25 subspecies of Milksnakes, all of which have Milksnake in their name except for the Scarlet Kingsnake (L. t. elapsoides). The subspecies are all very different in appearance but can all interbreed with ease.