- Note: (Syn. Alouatta belzebul ululata). Whereas Alouatta ululata Elliot, 1912 was considered as a synonyms of Alouatta belzebul, Gregorin (2006) placed it as distinct species, followed by IUCN
- Note: Many authors and source (ITIS & Mammal Species of the World) don't recognize this species or recognize it as a synonyms of Alouatta belzebul. But Gregorin (2006) & en.wikipedia & IUCN accept it as distinct species.
Media in category "Category:Alouatta ululata"
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