Solenodon
This animal’s appearance resembles a rat with long thin legs and it is included on the list of venomous mammals. The venom (which is in its saliva) gets into the victim’s body through grooves on the second lower incisors, just like a snake bite. As paradoxical as it might sound, solenodons don’t have immunity to their own venom — oftentimes, when a solenodon gets bitten in a fight, it dies.
This animal hasn’t undergone any changes over the past 76 million years, which is why it’s often called a living fossil.
It’s minimally dangerous for humans — only a few bites have been recorded in history and none of them have ended up as a tragedy. The pain and edema that do happen after a bite will disappear after a few days.