Pterodactylus? elegans? BSPG 1911 I 31 (no. 42 in the Wellnhofer 1970 catalog), Late Jurassic ~150mya, was considered a species of Pterodactylus, but is not related. Derived from a sister to no. 44, no. 42 phylogenetically preceded Huanhepterus and Sos 2428.
Distinct from no. 44, the skull of no 42 had a longer, flatter rostrum, an larger antorbital fenestra and a higher cranium. The quadrate angle was raised. The teeth and naris were smaller.
The cervicals were more gracile. The dorsal series was shorter, the dorsal ribs were shorter and only a short segment of tail was visible. No. 42 had a smaller torso volume.
The humerus was longer and more gracile, extending back to the acetabulum. The radius and ulna were longer. The fingers were more gracile.
The tibia was longer than the metacarpus. The metatarsals were nearly subequal. The unguals were larger. Pedal digit V was a vestige.
See the pterosaur family tree here.