For the quest
Panther Mastery ID 190, Level 33, Horde side (atleast) you are to kill
Young Panthers.. However, both Young Panthers AND adult
Panthers are displaying as being a part of the quest when you hover your mouse over them. Needless to say only the Young Panthers actually give quest credit.
When you view the map, however, the highlighted area is correct, it's just the mob's info box for the adult Panthers that is wrong. The adult panthers aren't used until the next quest of the Panther Mastery chain.