Yixianopterus jingangshanensis JZMP-V12 (Lü et al. 2006) ~20 cm skull length, Barremian/Aptian Early Cretaceous ~125 mya, was correctly considered an ornithocheirid pterosaur like Haopterus. Here Yixianopterus was derived from a sister toTM 13104 - n34, and phylogenetically preceded both cycnorhamphids, such BSp 1968 XV 132, and ornithocheirids.

Overall much larger than and distinct from Gmu-10157, the skull of Yixianopterus was longer judging by the pre-antorbital fenestra portion and the mandible. The teeth were more widely spaced.

The caudals were shorter. Fingers I-III were smaller, but the wing finger was much more robust. Manual 4.1 approached the elbow when folded and the wingtip was higher than the skull when quadrupedal. The pelvis and tibia were more robust.

See the pterosaur family tree here.

The Ornithocheiridae. Click to enlarge and expand.

Lü J, Ji S, Yuan C, Gao Y, Sun Z and Ji Q 2006. New pterodactyloid pterosaur from the Lower Cretaceous Yixian Formation of Western Liaoning. In J. Lü, Y. Kobayashi, D. Huang, Y.-N. Lee (eds.), Papers from the 2005 Heyuan International Dinosaur Symposium. Geological Publishing House, Beijing 195-203.

wiki/Yixianopterus