Snakes are a group of squamates with an enormous diversity in the Neotropics. However, the fossil record of this vertebrates is scarce in northern South America. Here I describe some fossil snakes from three different localities in Colombia. First, from the Miocene La Tatacoa Desert, I describe newly discovered precloacal vertebrae of the Alethinophidian snake Colombophis, including the first report of parazygantral foramina for this genus. Then, I describe a fossil jawbone of a large constrictor snake, which represents the first ophidian ever described for the Pliocene of Colombia. Finally, with the collaboration of different colleagues, we describe the biota of the Pleistocene locality of Pubenza, which includes turtles, rodents, armadillos and the first report of a fossil viper snake in Colombia.
