Original: There are two extant subspecies of Red Panda: the Western Red Panda (Ailurus fulgens fulgens) that lives in the western part of its range, and the somewhat larger Styan's Red Panda (Ailurus fulgens styani) that lives in the east-northeastern part of its range.
Simplified: There are two subspecies: Ailurus fulgens fulgens and Ailurus fulgens styani.