Jidapterus edentus (Dong, Sun & Wu 2003), Early Cretaceous, ~140mya, ~26 cm skull length, was originally considered an uncertain pterodactyloid and a possible tapejarid due to the large size of its antorbital fenestra and toothless jaws. Here Jidapterus was derived from a sister to BSPG 1911 I 31 (no. 42 in the Wellnhofer 1970 catalog) and phylogenetically preceded Chaoyangopterus and the rest of the Azhdarchidae, the giants of the pterosaurs.
Much larger than and distinct from no. 42, the skull of Jidapterus was toothless and taller posteriorly. The antorbital fenestra was also taller. The lacrimals was a narrow exposed stem.
The sternal complex was relatively smaller and rounder. The scapula and coracoid were more robust and the coracoid was enlarged. The humerus was more robust, concave anteriorly and had a larger deltopectoral crest. The wing extended as high as the base of the skull when folded.
The feet were larger with a relatively longer and more compact metatarsus. Metatarsal II was the longest. Pedal 1.1 was longer. The pedal unguals decreased in size laterally.
See the pterosaur family tree here.