What is "quercylurus"

Quercylurus major is an extinct nimravid carnivoran.

Q. major is a member of a family of "false sabre-tooths", Nimravidae. It was possibly the largest nimravid ever known, as its fossils suggest it was similar in size to the modern-day brown bear and was scansorial. It was very muscular, walked on plantigrade (flat-footed). So far, there is only one described species within this genus - Q. major.