Since the it has been considered politically incorrect to call a black cat a black panther. The big black cats are black leopards or black jaguars and are not referred to as black panthers by anyone who knows anything about big cats.
Black panther carrying her cub great shot here to see the pattern on the mother's coat. Panthers aren't a breed they are a coat color that occurs among Leopards and Jaguars. They are black with black spots. This looks to be a Jaguar.