sentences:  Wang and Zhou concluded that it compared most closely to "Nyctosaurus" and classified it as a nyctosaurid, although they found that its shin was proportionally longer compared to the femur and humerus in "Chaoyangopterus", that their animal had relatively shorter wings and longer legs than "Nyctosaurus", and that it still had four fingers.The classification of "Chaoyangopterus" has since become unsettled, with subsequent reviewers disagreeing with the nyctosaurid assessment.David Unwin, in a popular work, included it without comment with the tapejarid family of azhdarchoid pterosaurs, known for their large head crests.