To add to that craziness a second species named Cearadactylus ligabuei was described in 1993 from a nearly destroyed specimen, its skull was glued together after having been thoroughly crushed, which may or may not be assembled from multiple species. It has gone through a number of reviews, but rather than try to describe how each person arrived at each conclusion, here's a short encyclopedia summation of the second species' classification history:
Dalla Vecchia assigned C. ligabuei to the Cearadactylidae. Kellner concluded it was probably a member of Anhangueridae; Unwin in 2002 even named it Anhanguera ligabuei. Steel e.a. (2005) suggested it was a Coloborhynchus ligabuei.Typically now it is not included at all in the Cearadactylus genus, and that seems quite fair from what I have seen, so I have no personal objections to there only being one species in the genus!