†Hyphalosaurus Gao et al. 1999 (choristodere)
Synonym: Sinohydrosaurus Li et al. 1999 [objective synonym]
Full reference: K. -Q. Gao, Z. -L. Tang, and X. Wang. 1999. A long-necked diapsid reptile from the Upper Jurassic/Lower Cretaceous of Liaoning Province, Northeastern China. Vertebrata PalAsiatica 37(1):1-8
Parent taxon: Choristodera according to R. Matsumoto et al. 2013
Sister taxa: Cteniogenidae, Cteniogenys, Hyphalosauridae, Irenosaurus, Khurendukhosaurus, Lazarussuchus, Monjurosuchidae, Monjurosuchus, Neochoristodera, Pachystropheus, Philydrosaurus, Shokawa
Subtaxa: Hyphalosaurus baitaigouensis, Hyphalosaurus lingyuanensis
Type: Hyphalosaurus lingyuanensis
Ecology: