Research overview: the split of the Sunda leopard cat

Molecular phylogeography revealed that leopard cats on the Sunda islands of Southeast Asia diverge deeply from mainland leopard cats, leading to recognition of a separate species, the Sunda leopard cat, Prionailurus javanensis. This overview reviews the evidence: distinct mitochondrial lineages and biogeographic separation across the Isthmus of Kra and the Sunda region support two species rather than one. It discusses how the Cat Classification Task Force adopted this split, mirroring the clouded leopard case in dividing a widespread cat into mainland and Sunda species. The piece explains the role of Pleistocene sea-level changes in isolating island populations and driving divergence. It exemplifies a recurring pattern in Southeast Asian felids, where the dynamic geography of the Sunda Shelf repeatedly generated mainland-island species pairs.