There's a pronunciation discrepancy. The natives call the pteranodon Turu because they can't pronounce the 'L' in Tulu, the name given it by Deen.
The character of Baron Heinrich Von Freulich was voiced by actor Everett Sloane and expertly drawn to his likeness.
Once Deen locks Turu or Tulu in his cage the workers could have jumped the old man. But then, no storyline.