The ancients were pretty keen naturalists. They described flora and fauna from all over the world. You'd think T-Rexs and Brontosauri would be something they'd mention. Furthermore, the Romans put every exotic animal they could into the Coliseum for the amusement of the masses. Any Emperor would have paid a king's ransom for a triceratops, yet there is no evidence of any such animal in descriptions of gladiatorial games. Why not?
Marco Polo wrote of the “dragons” he encountered, as did Alexander. Are you going to write them off?
Which were most likely nothing more than large crocodiles or alligators.
Nice try for an amateur, but that idea has been well refuted by analysis of their descriptions.
From the description, it might be a Komodo Dragon
The big clue is that the creationist article editor-surveyor seems to refer to, and the book on Project Gutenberg, have the critter having a THREE-clawed foot (lizards have three toes), but dinosaurs had FOUR toes. Also, Marco Polo noted that the critter walked dragging its belly on the ground, while donosaurs walked with belly OFF the ground.