Monographs Details: Psychotria tapajozensis Standl.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.

Notopleura tapajoensis (Standi.) Brem., Rec. Trav. Bot. Neerl. 34: 290. 1934.

Psychotria amplinoda Steyerm. var ayangannae Steyerm., Mem. N. Y. Bot. Gard. 17(1): 433. 1967.

Psychotria amplinoda Steyerm., Mem. N. Y. Bot. Gard. 17(1): 431. 1967.

Psychotria tapajozensis Standl. was described from material with the flowers in bud, only 6 mm long, as contrasted to a normal length in anthesis of 10-11 mm for this taxon.