Fire belly newts

Species recognized as of October 2019:[1]

• Cynops chenggongensis Kou and Xing, 1983 (Chenggong fire belly newt)*
• Cynops cyanurus Liu, Hu, and Yang, 1962 (Chuxiong fire-bellied newt or blue-tailed fire belly newt)*
• Cynops ensicauda (Hallowell, 1861) (Japanese sword-tail newt)
• Cynops fudingensis Wu, Wang, Jiang, and Hanken, 2010 (Fuding fire belly newt)*
• Cynops glaucus Yuan, Jiang, Ding, Zhang, and Che, 2013
• Cynops orientalis (David, 1873) (Chinese fire belly newt)*
• Cynops orphicus Risch, 1983 (Dayang newt or Dayang fire belly newt)*
• Cynops pyrrhogaster (Boie, 1826) (Japanese fire belly newt)
• Cynops wolterstorffi (Boulenger, 1905) (Yunnan lake newt)*
• Cynops yunnanensis Yang, 1983

(A * means that the newt has been moved into the genus Hypselotriton in some classifications [2][3])

The genus Cynops has been suggested to be due for a split, with the Chinese species being placed in a separate genus from the Japanese ones.[4] The species Cynops cyanurus is at the centre of all this. There is much debate about the validity of C. cyanurus and C. chenggongensis. All the known captive animals could be something different from C. cyanurus, as they do not entirely match the original description of the species. The only known animals that match that are animals originating from Chemnitz Zoo, but the F2 animals have not bred well, which could suggest they are in fact a hybrid of C. cyanurus and C. chenggongensis or an undescribed Cynops species.