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Kaliwatan sa tanom nga balili ang Isolepis costata.^[1] Una ning gihulagway ni Ferdinand von Hochstetter ug Achille Richard.^[2] Ang Isolepis costata sakop sa kahenera nga Isolepis, ug kabanay nga Cyperaceae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Province of KwaZulu-Natal
• Free State
• Zimbabwe
• Kenya
• Etyopiya
• Tanzania
• Madagascar
• Uganda
• Zambiya
• Demokratikanhong Republika sa Konggo
• Burundi
• amihanang Habagatang Aprika
• Eastern Cape, Western Cape, Northern Cape
• Namibya
• Botswana
• Malawi
• Sudan
• Rwanda
• Eswatini
• Lesotho

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: 43190486. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Hochst. ex A.Rich. (1850) , In: Tent. Fl. Abyss. 2: 499
3. ↑ Govaerts R. (ed). For a full list of reviewers see: http://apps.kew.org/wcsp/compilersReviewers.do (2019). WCSP: World Checklist of Selected Plant Families (version Aug 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.