Dino cassettes?

Dear experts,
I'm now watching Call of the Primitives and Soundwave ejects two cassettes, a Ceratosaurus and a Stegosaurus. Who are these guys? Damn, I thought I have all the toy cassettes, apparently not!
I'm now watching Call of the Primitives and Soundwave ejects two cassettes, a Ceratosaurus and a Stegosaurus. Who are these guys? Damn, I thought I have all the toy cassettes, apparently not!