Boa constrictor
Colombophis ("snake of Colombia" in Greek) is an extinct genus of snakes of the clade Alethinophidia, a group of "primitive" snakes. The genus was first recognized in the Villavieja Formation in the town of Los Mangos, part of the known fossil fauna of La Venta in the department of Huila (Colombia), in the middle Miocene. With the remains of a fossil snake was erected the species "Colombophis portai" in 1977, based on forty fragmentary vertebrae. These vertebrae are characterized by a low neural spine, and subdivided paradiapophysis and thin zygosphen. The vertebrae are medium to large, so the snake would measure about long, similar in size to the current Boa constrictor.