Kaliwatan sa tanom nga bulak ang Drypetes diopa.^[1] Una ning gihulagway ni William Philip Hiern, ug gihatagan sa eksakto nga ngalan ni John Patrick Micklethwait Brenan.^[2] Ang Drypetes diopa sakop sa kahenera nga Drypetes, ug kabanay nga Putranjivaceae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Cabinda (lalawigan)
• Tunga-tungang Aprikanhong Republika
• Kamerun
• Gabon

Walay nalista nga matang nga sama niini.^[1]

1. ↑ ^{1.0 1.1 1.2} Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2019). "Species 2000 & ITIS Catalogue of Life: 2019 Annual Checklist". Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X. TaxonID: 43035059. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Brenan (1953) , In: Kew Bull. 8: 92
3. ↑ Govaerts R. (ed). For a full list of reviewers see: http://apps.kew.org/wcsp/compilersReviewers.do (2019). WCSP: World Checklist of Selected Plant Families (version Aug 2017). In: Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist (Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J., Penev L., eds.). Digital resource at www.catalogueoflife.org/annual-checklist/2019. Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X.