reptile genus

NOUN
13 LETTERS · STARTS WITH R

reptile genus is a valid 13-letter word worth 15 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1P3T1I1L1E1G2E1N1U1S1
1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does reptile genus mean?