Overall much larger than and distinct from No. 30, the skull of Cycnorhamphus was more robust with a large parietal crest with a narrow frontal contribution. The anterior maxilla was slightly upturned. The teeth were longer in the anterior portion of the jaws.

The eighth cervical was reduced. The torso was shorter (more compact) with a larger porportion devoted to the sacrals.

The sternal complex was rounder, lacking any of the sharp corners found in No. 30. The scapula was shorter and more laterally oriented. The humerus was shorter, but the elbow still extended posteriorly just to the tip of the ilium. The metacarpals were longer as were fingers I-III. Digit III was an ungual longer than II.

The pelvis was more robust. The tibia was longer in concert with the metacarpus such that the wrist and knee remained aligned. Pedal digits II and V were further elongated.

"Pterodactylus" grandipelvis is known from a partial pelvis that resembles that of Cycnorhamphus, but twice as large with a deeper prepubis.

See the pterosaur family tree here.

Cycnorhamphus, its sisters and predecessors. Click to enlarge.

Pterofiltrus qiui (Jiang and Wang 2011) was considered a ctenochasmatid pterosaur, but here it nests as a cycnorhamphid. Only the skull is known and it was crushed and disarticulated.

Bennett SC 1996. On the taxonomic status of Cycnorhamphus and Gallodactylus Pterosauria: (Pterodactyloidea). - Journal of Paleontology 70: 335–338.

Bennett SC 2010. The Morphology and Taxonomy of Cycnorhamphus. Acta Geoscientica Sinica 31 Supplement 1, The Flugsaurier Third International Symposium on Pterosaurs.

Jiang S-X and Wang X-L 2011. A new ctenochasmatid pterosaur from the Lower Cretaceous, western Liaoning, China. Anais da Academia Brasileira de Ciencias 83(4):1243-1249. online pdf

Quenstedt FA 1855. Über Pterodactylus suevicus im lithographischen Schiefer Württembergs. Doctoral thesis, Universität Tübingen.

Seeley HG 1870. The Ornithosauria: an elementary study of the bones of pterodactyles. - Cambridge: Deighton, Bell, & Co.: xviii + 135 pp., 12 plates.

Wellnhofer P 1970. Die Pterodactyloidea (Pterosauria) der Oberjura-Plattenkalke Süddeutschlands. Abhandlungen der Bayerischen Akademie der Wissenschaften, N.F., Munich 141: 1-133. International Dinosaur Symposium. Geological Publishing House, Beijing 195-203.

wiki/Cycnorhamphus