Pteroactylus? micronyx? B St 1936 I 50 (no. 30 in the Wellnhofer 1970 catalog) ~2.5 cm skull length, Late Jurassic ~150 mya, was considered a Pterodactylus micronyx. Here No. 30 was derived from a sister to BSp 1968 XV 132 and phylogenetically preceded Cycnorhamphus (no. 53 in the Wellnhofer 1970 catalog) and Feilongus. Standing ~7 cm tall, this is one of the smallest of all known pterosaurs. If it was an adult, eggs were no more than 3 mm in diameter.
Much smaller than and distinct from BSp 1968 XV 132, the skull of no. 30 was relatively smaller with a shorter rostrum.
The cervicals had short neural spines. The torso was longer.
The sternal complex was wider. The coracoid was longer. The humerus was longer and more robust. The wing finger was more gracile.
The pubis was directed ventrally. The prepubis had a large perforation. The feet were larger and digit V was especially enlarged.
See the pterosaur family tree here.