Titanoboa , Titanoboa cerrejonensis , extinct snake that lived during the Paleocene Epoch 66 million to 56 million years ago , considered to be the largest known member of the suborder Serpentes. Titanoboa is known from several fossils that have been dated to 58 million to 60 million years ago. From extrapolations of body size made from excavated vertebrae individual sections of the backbone , paleontologists have estimated that the body length of the average adult Titanoboa was roughly 13 metres Titanoboa is related to living anacondas and boas , but it is uncertain whether it was more closely related to one or another of these modern constrictor snakes. The remains of approximately 30 individuals have been recovered. The majority are adults, but some juveniles have been found. Most specimens are made up of vertebrae and ribs, which is typical of snake fossils. It is estimated that Titanoboa may have had more than vertebrae. At least one nearly complete specimen with a skull has been recovered.
Titanoboa simply has no equal among modern snakes, with even the anaconda paling in comparison.
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They could grow up to The giant snake lived during the Middle to Late Paleocene epoch ,  a million-year period immediately following the Cretaceous-Paleogene extinction event. The only known species is Titanoboa cerrejonensis , the largest snake ever discovered,  which supplanted the previous record holder, Gigantophis. The name Titanoboa means " titanic boa ".
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The extinction of the dinosaurs birds notwithstanding When the last T. Indeed, this was one of the greatest mass extinction events of all time. It also marked the dawn of our current geologic era: the Cenozoic, or the "Age of Mammals. But don't let the nickname fool you.
The trees had wider leaves, indicating greater precipitation—more than inches of rain per year, compared with 80 inches for the Amazon now. Mean temperatures may have hovered in the mid- to highs Fahrenheit or higher. Deep water from north-flowing rivers swirled around stands of palm trees, hardwoods, occasional hummocks of earth and decaying vegetation. Mud from the flood plain periodically coated, covered and compressed the dead leaves, branches and animal carcasses in steaming layers of decomposing muck dozens of feet thick. The river basin held turtles with shells twice the size of manhole covers and crocodile kin—at least three different species—more than a dozen feet long. And there were seven-foot-long lungfish, two to three times the size of their modern Amazon cousins. The lord of this jungle was a truly spectacular creature—a snake more than 40 feet long and weighing more than a ton. It was a swamp denizen and a fearsome predator, able to eat any animal that caught its eye. Scientists call it Titanoboa cerrejonensis. Research on the snake and its environment continues, and I caught up with the Titanoboa team during the field season.