Kaliwatan sa bakukangon ang Ptochus bengalensis.^[1] Una ning gihulagway ni Voss ni adtong 1922.^[2] Ang Ptochus bengalensis sakop sa kahenera nga Ptochus, ug kabanay nga Curculionidae.^[1][3] 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: 54179762. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Voss E. (1922) Neue Russelkafer aus verschiedenen Erdteilen , Deutsche Entomologische Zeistchrift, 1922: 166–174.
3. ↑ Yunakov N. (2019). 3i Curculio: 3i taxonomic databases, Curculionidae, subfamily Entiminae (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.