The Sumatran clouded leopard is estimated to have diverged from the Bornean clouded leopard in the Late Pleistocene, between 400 and 120 thousand years ago. Land bridges that were created due to low sea levels in the Late Pleistocene were submerged by rising sea levels, resulting in the Sumatran clouded leopard becoming separated from the mainland population at this time.[2]
^Kitchener, A. C.; Breitenmoser-Würsten, C.; Eizirik, E.; Gentry, A.; Werdelin, L.; Wilting, A.; Yamaguchi, N.; Abramov, A. V.; Christiansen, P.; Driscoll, C.; Duckworth, J. W.; Johnson, W.; Luo, S.-J.; Meijaard, E.; O’Donoghue, P.; Sanderson, J.; Seymour, K.; Bruford, M.; Groves, C.; Hoffmann, M.; Nowell, K.; Timmons, Z. & Tobe, S. (2017). "A revised taxonomy of the Felidae: The final report of the Cat Classification Task Force of the IUCN Cat Specialist Group"(PDF). Cat News (Special Issue 11): 64–65.
^Holden J. (2001). "Small cats in Kerinci Seblat National Park, Sumatra, Indonesia: evidence collected through photo-trapping". Cat News (35): 11–14.
^Pusparini, W.; Wibisono, H.T.; Reddy, G.V.; Tarmizi; Bharata, P. (2014). "Small and medium sized cats in Gunung Leuser National Park, Sumatra, Indonesia". Cat News (Special issue 8): 4–9.