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.

Ardeadactylus (von Meyer 1854) lost in WWII, a cast is kept at the Dublin Natural History Museum. Wikipedia reports, "Only two specimens of Ardeadactylus are known to exist currently: SMNS 56603 (earlier SMNS 5802) found in 1874, a specimen from Nusplingen initially thought to belong to the species Pterodactylus suevicus Quenstedt (currently Cycnorhamphus) and the neotype of the species, and JME-SOS 2428," but these are distinct specimens, not Ardeadactylus. Only the Dublin cast reflects the holotype.

Meyer, C.E.H. von, 1854, Mittheilungen an Professor Bronn: Anthracotherium Dalmatinum vom Monte Promina u.a. A.; Chelydra Decheni aus Braunkohle des Siebengebirges; Wirbelthier-Reste aus dem Basalttuff-Konglomerat zu Glimbach an der Rabenau; angebliches Vorkommen von Agnotherium antiquum und Hyaena spelaea; fossile Reste im lithographischen Schiefer von Nusplingen bei Spaichingen; Eryon Schuberti; Litogaster; Pemphix; Pterodactylus longicollum n. sp. in Solenhofener Schiefer; Acrosaurus Frischmanni von da; Reptilien und Cancer-Arten im Kressenberger Nummuliten-Gestein", Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde 1854: 47-58.

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