Dubreuillosaurus valesdunensis

Dubreuillosaurus is an extinct genus of carnivorous theropod dinosaur from the Middle Jurassic period, approximately 167.7 million years ago. Its fossils were discovered in Normandy, France, in sedimentary rocks indicative of coastal, mangrove swamp environments. The genus was named in 2005 by paleontologist Ronan Allain, honoring the Dubreuil family, with the type species designated as Dubreuillosaurus valesdunensis. 

This megalosaurid theropod is characterized by an unusually low and elongated skull, measuring three times its height. The holotype specimen, MNHN 1998-13, represents a subadult individual estimated to be around 5 meters (16 feet) in length and weighing approximately 250 kilograms (550 pounds). However, adult individuals may have reached lengths up to 9 meters (30 feet). 

The anatomical features of Dubreuillosaurus suggest it was a carnivore, with adaptations possibly indicating a diet that included fish and other marine prey, aligning with its coastal habitat. Its discovery has provided valuable insights into the diversity and distribution of megalosaurid theropods in Europe during the Middle Jurassic.