T. rex and the World of the Tyrannosaurs Wiki

Spectrovenator (meaning Hunter of Ghosts) is an extinct member of the family Abelisauridae. It lived in Brazil from The late Huaterivian to the Coniacian, or from 125.7-89.3 MYA. It was named "Ghost Hunter" because the holotype of Spectrovenator was unexpectedly found under the holotype of the sauropod Tapuiasaurus. It contains a single species, Spectrovenator Bonapartei.