mammal family

NOUN
13 LETTERS · STARTS WITH M

mammal family is a valid 13-letter word worth 26 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3A1M3M3A1L1F4A1M3I1L1Y4
3 + 1 + 3 + 3 + 1 + 1 + 0 + 4 + 1 + 3 + 1 + 1 + 4 =26 PTS
DOUBLE WORD → 52TRIPLE WORD → 78
MEANING

What does mammal family mean?