Ctenochasma gracile (Wagner 1861, Oppel 1862, BSP AS VI 30, no. 65 in the Wellnhofer 1970 catalog) was derived from a sister to no. 45 and was a sister to Gegepterus and Pterodaustro.

Larger overal and distinct from No. 45, the skull of Ctenochasma gracile was longer with a relatively smaller cranium and orbit.

The cervicals were much longer, as in Gegepterus. The sacrals and caudals were much shorter.

The scapula was larger. The humerus was more gracile. The metacarpus was longer. The wing finger was more gracile and extended above the skull when folded and quadrupedal.

The pelvis was half the size. The ischium had two posterior processes. The hind limbs were longer and more gracile. The metatarsals were more subequal. Pedal digit V was a vestige.

While it is tempting to see Ctenochasma elegans as a juvenile of C. gracile, note the many phylogenetic differences. The cervicals were shorter and the torso was longer. The scapula was longer and the coracoid was dorsally smaller. The deltopectoral crest had a distinct shape. The metacarpus was longer. The proximals phalanges of the manus were subequal. The prepubis had a distinct shape. The metatarsals were longer relative to the pedal phalanges. Pedal 4.1 was longer than p4.4.

See more ctenochasmatids here. The dorygnathid tree is here. The pterosaur family tree is here. More on pterosaur wings here and here.

Bennett SC 1996. Year-classes of pterosaurs from the Solnhofen Limestone of Germany: Taxonomic and Systematic Implications. Journal of Vertebrate Paleontology, 16(3):432-444.

Bennett SC 2007. A review of the pterosaur Ctenochasma: taxonomy and ontogeny. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 245(1): 23-31.

Buisonjé de PH 1981. Ctenochasma porocristata nov. sp. from the Solnhofen Limestone, with some remarks on other Ctenochasmatidae. Proceedings of the Koninklijke Nederlandse Akademie van Wetenchappen, B, 84 (4): 411-436. online

Jouve S 2004. Description of the skull of a Ctenochasma (Pterosauria) from the latest Jurassic of eastern France, with a taxonomic revision of European Tithonian Pterodactyloidea. Journal of Vertebrate Paleontology, 24(3):542-554.

von Meyer CEH 1852. Ctenochasma Roemeri. Paläontographica, 2: 82–84 & pl. 13.

Oppel A 1862. Über Fährten im lithographischen Schiefer. Paläontologische Mitteilungen aus dem Museum des Koenigl. Bayrischen Staates, ed. A. Oppel, 1:121–125 & pl. 39. Stuttgart: Ebner & Sembek.

Taquet P 1972. Un crane de Ctenochasma (Pterodactyloidea) du Portlandien infe rieur de la Haute-Marne, dans les collections du Musee de St-Dizier. Comptes Rendus de l’Academie des Sciences, 174: 362–364.

Wagner JA 1861 Charakteristik einer neuen Flugeidechse, Pterodactylus elegans. Sber. k. bayer. Akad. Wiss. math.-phys. Kl. pp. 363–365.

Wellnhofer P 1970. Die Pterodactyloidea (Pterosauria) der Oberjura-Plattenkalke Süddeutschlands. Abhandlungen der Bayerischen Akademie der Wissenschaften, N.F., Munich 141: 1-133.

paleocritti/Ctenochasma

wiki/Ctenochasma