Pterodactylus? micronyx? Gmu-10157 (undescribed) ~3 cm skull length, was considered a juvenile Pterodactylus, but it is unrelated. Gmu-10157 was derived from a sister toTM 13104 - n34 and phylogenetically preceded cycnorhamphids like BSp 1968 XV 132 and ornithocheirds like Yixianopterus.
Overall half the size and distinct from the TM 13104 - n34, the skull of Gmu-10157 was lower and wider. The naris was greatlty reduced to the size of the secondary naris in the pattern of Pterorhynchus.
The cervicals were more robust and longer. The tail was shorter and more gracile.
The sternal complex had a shield shape. The humerus was more elongated and robust. The proximal wing elements were shorter such that the joint between m4.2 and m4.3 was only slightly beyond the elbow. Distinct from all succeeding taxa the three free fingers remained large.
The prepubis was broader. The hind limb was slightly longer. The tibia was more robust.
Pterodactylus? pulchellus BM NHM 42735 is the same size as the Gmu specimen, but has a longer rostrum. It is one node closer to the common ancestor of cycnorhamphids and ornithocheirids. The sternal complex was not found. Soft tissue confirms the narrow chord wing membrane. Pedal digit 5 remained long.
See the pterosaur family tree here. |
