Kaliwatan sa bitin ang Chironius laevicollis^[1]. Una ning gihulagway ni Wied-neuwied ni adtong 1824.^[2] Ang Chironius laevicollis sakop sa kahenera nga Chironius, ug kabanay nga Colubridae.^[1][3]

Kini nga matang hayop na sabwag sa:

• BZS-PR
• Rio de Janeiro
• São Paulo
• Espírito Santo (estado)
• Minas Gerais
• Bahia (estado)
• Santa Catarina
• Rio Grande do Sul (estado sa Brasil)

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: 28890825. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Frank, Norman & Ramus, Erica (1995) A Complete Guide to Scientific and Common Names of Reptiles and Amphibians of the World. , Pottsville: N G Publishing Inc., 377 pp.
3. ↑ Uetz P. & Hošek J. (2019). The Reptile Database (version Dec 2015). 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.