Kaliwatan sa bakukangon ang Rhomphocallus maruyamai.^[1] Una ning gihulagway ni Volker Assing ni adtong 2003.^[2] Ang Rhomphocallus maruyamai sakop sa kahenera nga Rhomphocallus, ug kabanay nga Staphylinidae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Hapon
  • Hokkaido (pulo sa Hapon)
• Ryukyu Islands
• Koreya

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: 53274354. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Assing, V. (2003) A new genus of Oxypodini (Coleoptera, Staphylinidae, Aleocharinae) from the Palaearctic region. , Bulletin of the National Science Museum (A: Zoology), 29 (3): 166-176.
3. ↑ Newton A.F. (2019). StaphBase: Staphyliniformia world catalog database (version Nov 2018). 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.