Armand de Ricqlès

TL;DR: The first birds reduced their adult body size by shortening the phase of rapid growth common to their larger theropod dinosaur relatives as mentioned in this paper, which was primarily related not to physiological differences but to differences in growth strategy.

TL;DR: The presence of an external fundamental system at the external surface of the cortex and mature epiphyses indicate that the Hypacrosaurus specimen had reached adulthood and growth had slowed considerably from earlier stages, indicating that descriptions of dinosaur physiology as "intermediate" between the physiology of living reptiles and that of living birds and mammals may or may not be valid.

TL;DR: There is a clear difference in histological tissue types, and hence in growth regimes and rates, between pseudosuchian and ornithosuchians, which extends back to the separation of these two archosaurian lineages at least by the Middle Triassic.

TL;DR: De Ricqles et al. as mentioned in this paper sampled the bone histology of various archosauriforms and basal archosaurs from the Triassic and Lower Jurassic: erythrosuchids, proterochamp-sids, euparkeriids, and basal ornithischian dinosaurs.

TL;DR: It suggests that juvenile plesiosaurs kept a conservative (plesiomorphic) ecology for sauropterygians, as poorly mobile, lagoon or shore dwellers while, in contrast, the adults would shift towards much more active locomotory behaviors in the open sea.