The Western Desert of Egypt exhibits well exposures of Late Cretaceous deposits, containing varieties of
marine and terrestrial vertebrate fossils. The Quseir Formation (Campanian age) contains vertebrate fossils
such as dinosaurs, turtles and crocodyliforms remains. This formation is formed of variegated shale and
siltstone intercalations, indicating supratidal marsh environment. The present work concerns with the
histology and the diagenetic process of the Late Cretaceous juvenile crocodyliform vertebrae from the
Campanian deposits of the Quseir Formation of the south of Baris Oasis, Western Desert of Egypt. It provides
the first discovery of the Late Cretaceous juvenile neosuchian crocodyliform postcranial remains in Egypt, in
addition to the study of the early and the late diagenesis phases exhibited by the microbial activities and the
minerals precipitations of the bone cavities.