Final answer:
Hylobatidae refers to the family of gibbons, small apes found in Southeast Asia known for their brachiating locomotion, distinctive calls, and complex social behaviors.
Step-by-step explanation:
Hylobatidae refers to the family of gibbons, which are part of the Hominoidea superfamily. Gibbons are small apes known for their brachiating locomotion, meaning they swing through the trees using their long arms. They are found in Southeast Asia and are known for their distinctive calls and complex social behaviors.