“…Several studies have shown that salamanders and newts exhibit geographic variation in terms of morphological characteristics, for example, in the genera Hynobius (Matsui et al., 2009; Nishikawa et al., 2007; Tominaga et al., 2005), Echinotriton (Ozaki et al., 2023), Salamandra (Šunje et al., 2019) , Neurergus (Rastegar‐Pouyani et al., 2005), Triturus (Arntzen & Wallis, 1999), and Mesotriton (Sotiropoulos et al., 2008). Asian warty newts within the genus Paramesotriton are widely distributed in China and northern Vietnam; however, the geographic variation in their morphology has not been extensively studied.…”