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And while we are at talking about pterosaur ontogeny...

Kevin Padian, John R. Horner & Armand de Ricqlès: Growth in small dinosaurs
and pterosaurs: The evolution of archosaurian growth strategies, JVP 24(3),
555 -- 571 (September 2004)

This is a paper about, guessed it, bone histology. It shows that
- *Eudimorphodon cromptonellus* (MGH VP 3393) is neither adult nor a small
- a large specimen of *Dimorphodon*, YPM 350, has passed the phase of fast
growth, so looks like adult or nearly so, while a smaller one, YPM 9182, was
still growing fast;
- "Clearly, more analysis of these complex bones is needed", meaning CM
11433 (which "fits Bennett's (1995) first size-class") and Ray Alf Museum
V97017/258 (which "approximates Bennett's (1995) second size-class"). The
latter's tibia "may show the onset of the" external fundamental system. Both
specimens were still growing and have LAGs.
- A specimen of *Pterodactylus*, CM 11430, is histologically "not similar to
that of *Rhamphorhynchus*, just described, although this specimen is close
in size to the larger *Rhamphorhynchus* specimen described above. By size
alone it would be expected to be at the sub-adult or nearly adult stage;
however, this interpretation is not clearly supported by the bone
histology." It is smaller than *Gallodactylus* and similar in size to *P.