Tropers / Aespai

Aespai is an extant species of hyper carnivorous vertebrate that originally lived 15.9 to 25.6 million years ago, during the Cenozoic Era.

The taxonomic assignment of Aespai has been debated for nearly a century, and is still under dispute amongst TV Tropes forum experts.
http://tvtropes.org/pmwiki/pmwiki.php/Tropers/Aespai