摘要:1 IntroductionIn recent years, numerous pterosaurs had been foundfrom continental sediments in the Yixian Formation and theJiufotang Formation of the western Liaoning Province andits neighboring areas of China. To this date, nine generaand ten species have been reported. These includeEosipterus yangi (Ji and Ji, 1997), Dendrorhynchoidescurvidentatus (Ji and Ji, 1998; Ji et al., 1999), Haopterusgracilis (Wang and Lü, 2001), Jeholopterusningchengensis (Wang et al., 2002), Sinopterus don…