can anyone id this species?

[mark and marley]

Is this a joke?

no im totally serious.i have a stegosaurus in a tank..i was joking but for pondering purposes.
some scientists believe they were cold blooded and many scientists disagree. do you know how big insects were back then when the air was purer? freaking huge.so its not as stupid as it sounds.so if there were gigantic bugs there would have to be gigantic dinosaurish snakeses?no?hmmm.goooogle.