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Description
Aglyphous snakes have small, needle-like teeth oriented backwards meant for latching onto prey and prevent it from escaping so that they can kill using constriction. They don't have any type of venom glands or specialized fangs, most of the teeth are roughly the same size. Most snakes with this type of dentition are nonvenomous and/or constrictor snakes,

Opistoglyphous snakes have backwards oriented teeth similar to aglyphs, however they also have two larger fangs near the back of the mouth which are connected to venom glands. These fangs however aren't as specialized as in proteroglyphs and solenoglyphs, so the venom is in the majority of cases not lethal to humans and is meant for killing small prey. These teeth are found in members of the colubrid family, especially mildly venomous ones.

Proteroglyphous snakes belong to the elapid family, which contains some of the deadliest snakes known to man, aka mambas, corals, taipans, sea snakes and cobras. They have two front fangs connected to large venom glands. However, unlike solenoglyphs, these fangs are fixed to the jaw and can't move, so they need to be shorter so that the snake can close its mouth properly.

And finally Solenoglyphs, aka vipers, have fangs capable of injecting venom much as proteroglyphs (though the venom has developed differently in both groups), and the difference is that solenoglyphs can move their fangs and retract them to the ceiling of the mouth when it closes. This way, it allows solenoglyphous snakes to have longer fangs than other snakes.

The species shown in the drawing are:
Red: Boa constrictor
Green: Green vine snake
Purple: King cobra
Blue: Eyelash palm pitviper

Description
Aglyphous snakes have small, needle-like teeth oriented backwards meant for latching onto prey and prevent it from escaping so that they can kill using constriction. They don't have any type of venom glands or specialized fangs, most of the teeth are roughly the same size. Most snakes with this type of dentition are nonvenomous and/or constrictor snakes,

Opistoglyphous snakes have backwards oriented teeth similar to aglyphs, however they also have two larger fangs near the back of the mouth which are connected to venom glands. These fangs however aren't as specialized as in proteroglyphs and solenoglyphs, so the venom is in the majority of cases not lethal to humans and is meant for killing small prey. These teeth are found in members of the colubrid family, especially mildly venomous ones.

Proteroglyphous snakes belong to the elapid family, which contains some of the deadliest snakes known to man, aka mambas, corals, taipans, sea snakes and cobras. They have two front fangs connected to large venom glands. However, unlike solenoglyphs, these fangs are fixed to the jaw and can't move, so they need to be shorter so that the snake can close its mouth properly.

And finally Solenoglyphs, aka vipers, have fangs capable of injecting venom much as proteroglyphs (though the venom has developed differently in both groups), and the difference is that solenoglyphs can move their fangs and retract them to the ceiling of the mouth when it closes. This way, it allows solenoglyphous snakes to have longer fangs than other snakes.

The species shown in the drawing are:
Red: Boa constrictor
Green: Green vine snake
Purple: King cobra
Blue: Eyelash palm pitviper