Kenner’s Jurassic Park line was supposed to have had an additional wave of figures, but they were never released at retail. Fortunately, the 1997 Lost World line re-used some of those prototypes, one of which was this Estemmenosuchus. It was never released as a stand-alone figure, instead being included in a playset with a Scutosaurus, a human figure, and lots of accessories.
Collecta has been bringing out prehistoric animal tubes over the last few years, and while some gave us some great new designs, others have just given us miniature versions of models they already have. This is a case of the latter, as they have released these small versions of their ancient mammals.