One of the larger, but not the largest, Rhamphorhynchus specimens is R. megadactylus (n52). It’s a classic roadkill fossil. Nearly all the parts are there, only difficult to segregate.
Some of the bones (skull, backbone, hind limb) are easy to identify. DGS (digital graphic segregation) helps a little in identifying the more difficult parts. As a reminder, a reconstruction and phylogenetic analysis are paramount to make sure you have identified all the parts correctly by fitting them together and that sister taxa share most traits.
Prior literature indicates that large specimens should have a fused scapulocoracoid. Here one remains fused after the taxonomic mixing, but the other does not.
Some other details are tiny and tricky. If you can, see if you can see the bones of manual digit 5 here (Fig. 4, one metacarpal and three phalanges, including the ungual).
Similarly, can you see the ungual (p5.3) at the tip of pedal digit 5 here (Fig. 5)?
Wellnhofer P 1975a-c. Teil I. Die Rhamphorhynchoidea (Pterosauria) der Oberjura-Plattenkalke Süddeutschlands. Allgemeine Skelettmorphologie. Paleontographica A 148: 1-33.Teil II. Systematische Beschreibung. Paleontographica A 148: 132-186. Teil III. Paläokolgie und Stammesgeschichte. Palaeontographica 149: 1-30.