Phylogeography of the Laotian Rock Rat (Diatomyidae:Laonastes): Implications for Lazarus Taxa

A groundbreaking study reveals that the Laotian Rock Rat (Laonastes), a reclusive mammal, exhibits significant genetic divergence across its range in Phong Nha-Ke Bang and Hin Nam No National Parks, suggesting it may represent a 'Lazarus taxon'—a species thought extinct but rediscovered. This discovery challenges traditional views on biodiversity in these UNESCO-listed karst landscapes. Researchers analyzed mitochondrial DNA from 20 individuals, uncovering deep phylogenetic splits that imply long-term isolation in the region's complex cave systems. The findings highlight the importance of these parks as refugia for unique and cryptic species, emphasizing the need for targeted conservation efforts to protect such elusive fauna.

Le, M., Nguyen, H. M., Duong, H. T., Nguyen, T. V., Dinh, L. D., Nguyen, N. X., Nguyen, L. D., Dinh, T. H., & Nguyen, D. X. (2015). Phylogeography of the Laotian Rock Rat (Diatomyidae:Laonastes): Implications for Lazarus Taxa. Mammal Study, 40(2), 109–114. https://doi.org/10.3106/041.040.0206