pygmy chimpanzee vs Pan paniscus

pygmy chimpanzee and Pan paniscus both are nouns.

Word	Noun	Adjective	Verb	Adverb
pygmy chimpanzee	Yes	No	No	No
Pan paniscus	Yes	No	No	No

As nouns, pygmy chimpanzee and Pan paniscus are synonyms defined as:

pygmy chimpanzee and Pan paniscus: small chimpanzee of swamp forests in Zaire; a threatened species

Other synonyms of pygmy chimpanzee include bonobo.

pygmy chimpanzee (noun)	Pan paniscus (noun)
small chimpanzee of swamp forests in Zaire; a threatened species	small chimpanzee of swamp forests in Zaire; a threatened species