From The Collaborative International Dictionary of English v.0.48 :
Panthera \Panthera\ prop. n.
The genus of large felines including the lions; leopards;
snow leopards; jaguars; tigers; cheetahs; and saber-toothed
tigers.
Syn: genus Panthera.
[WordNet 1.5]
From WordNet (r) 3.0 (2006) :
Panthera
n 1: lions; leopards; snow leopards; jaguars; tigers; cheetahs;
saber-toothed tigers [syn: Panthera, genus Panthera]