摘要:1 Introduction Toothless pterosaurs are much less abundant than toothed forms and most of them come from the Late Cretaceous (Wellnhofer, 1991). Toothless forms from the Early Cretaceous of western Liaoning are Tapejaridae including Sinopterus dongi (Wang and Zhou, 2002), Sinopterus gui (Li et al., 2003) and a new genus (Lü and Yuan, in review); Chaoyangopterus (Wang and Zhou, 2003); Jidapterus (Dong et al., 2003) and a new pterosaur (Lü and Zhang, in review). The long and toothless …
