well that's a big problem with cryptozoology isn't it? (I love cryptozoology by the way, but I also love common sense and scientific logic! I would, for example, never use the word "probable" when suggesting a smaller form of
Titanoboa was still living in the historically recent past!!). All too often cryptozoologists say something that amounts to "hey, some guy claims he saw a 90 foot snake in the Amazon: this fossil snake from 60 million years ago grew sort of that big, it must be a surviving form of that!" "Well, why not just an exaggerated report of an 25 foot anaconda, or he just made it up?" "No, the coelacanth was thought to have become extinct that long ago too and its still here, so therefore literally anything is possible."
D), I do wonder if a 15m snake persisted into historic times. Indeed, early explorers spoke of 100ft snakes. Even if they doubled the length to exaggerate or due to poor estimations, that's still a 50ft (15m) snake. The natives also have stories of extremely long snakes inhabiting the forests - maybe they are oral legends about titanoboa......
