Kaliwatan sa bakukangon ang Hygrotus sylvanus.^[1] Una ning gihulagway ni Henry Clinton Fall ni adtong 1917.^[2] Ang Hygrotus sylvanus sakop sa kahenera nga Hygrotus, ug kabanay nga Dytiscidae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Amihanang Amerika

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: 9284499. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ (1996) , database, NODC Taxonomic Code
3. ↑ Tom Orrell (custodian), Dave Nicolson (ed). (2019). ITIS Global: The Integrated Taxonomic Information System (version Jun 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.