Kaliwatan sa bakukangon ang Onthophagus masaoi.^[1] Una ning gihulagway ni Teruo Ochi ni adtong 1992.^[2] Ang Onthophagus masaoi sakop sa kahenera nga Onthophagus, ug kabanay nga Scarabaeidae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Asya
  • Sabah (estado)
  • Brunei

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: 54739227. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Ochi T. (1992) A new Scarabaeid species of the genus Onthophagus from Borneo , The Entomological Review of Japan 47(1):1-4
3. ↑ Schoolmeesters P. (2019). Scarabs: World Scarabaeidae Database (version Jan 2019). 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.