袋手長猿

袋(ふくろ) (fukuro, “sack”) + 手長猿(てながざる) (tenagazaru, “gibbon”)

袋(ふくろ)手(て)長(なが)猿(ざる) or 袋手長猿(フクロテナガザル) • (fukurotenagazaru) 

1. siamang, Symphalangus syndactylus

As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts (where katakana is customary).