This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Tarantasio (Italian)
Legend tells us of a great dragon like creature named Tarantasio that roamed the Po Valley during the 12th and 13th centuries. This creature resided in Lake Gerundo between Milan, Lodi and Cremona. Lake Gerundo no longer exists as it was drained, but there was a time where it was home to this creature that terrorized the land and had an appetite for humans especially children.
Tarantasio had features of a dragon as well as a snake and was feared for good reason by those that lived in the area. The lake most likely more of a swamp area had a horrific gaseous odor that emanated from the creature's breath that was poisonous and caused many deaths. Many attempts were made to rid the land of this horrible creature but they did not end well for those who tried.