xanthognathus, Synbranchus Richardson [J.] 1845:no p., Pl. 52 (fig. 7) [Ichthyology.--Part 2. The zoology of the voyage of H. M. S. Sulphur; ref. 20574] Canton, China. No types known. Originally Synbranchus ? xanthognathus. Available from plate. Appeared as Monopterus? vel Synbranchus? xanthognathus in Richardson 1845:118 [ref. 20275]. Based solely on illustration by Reeves (see Whitehead 1970 [ref. 11606]). •Synonym of Monopterus albus (Zuiew 1793) -- (Rosen & Greenwood 1976:57 [ref. 7094], Menon 1999:279 [ref. 24904]). •Synonym of Monopterus javanensis Lacepède 1800 -- (Kottelat 2013:308 [ref. 32989]). Current status: Synonym of Monopterus javanensis Lacepède 1800. Synbranchidae. Habitat: freshwater, brackish.