Acinonyx Jubatus is the species name of Cheetah, also known as the fastest land animal. It is the only extant member of the genus "Acinonyx", which is Greek for "no-move-claw". This refers to the fact that Cheetah doesn't have retractable claws unlike the other big-cat species. The word "Jubatus" means "maned" or "crested" in Latin, a reference to the The crest down the center of the back found in cheetah cubs.