Kaliwatan sa bakukangon ang Agathidium longum.^[1] Una ning gihulagway ni Angelini ug De Marzo ni adtong 1985.^[2] Ang Agathidium longum sakop sa kahenera nga Agathidium, ug kabanay nga Leiodidae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Nepal

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: 53256945. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Angelini, F. & L. De Marzo. (1985) Reports of Agathidium from central Nepal and North India: expeditions 1979 and 1981 of Geneva Natural History Museum (Coleoptera, Leiodidae). , Revue Suisse de Zoologie, 92 (1): 33-76.
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.