Middle Jurassic

Reconstructed skull of Duriavenator hesperis showing known material (white) of the holotype and only known specimen. Unknown bones based on related Eustreptospondylus oxoniensis. Scale bar is 10cm, image is 10px/cm. Cranial anatomy based on Benson (2008) "A redescription of "Megalosaurus" hesperis (Dinosauria, Theropoda) from the Inferior Oolite (Bajocian, Middle Jurassic) of Dorset, United Kingdom"

Reconstructed skull of Wiehenvenator albati based on holotype specimen (white). Scale bar is 10cm, image if 10px/cm. Unknown material based on related Torvosaurus tanneri. Cranial anatomy based on Rauhut et al (2016) "A new megalosaurid theropod dinosaur from the late Middle Jurassic (Callovian) of north-western Germany: implications for theropod evolution and faunal turnover in the Jurassic"

Fossil of Streptospondylus, a dinosaur from the Middle Jurassic period of France. Took the photo at the Gallery of Paleontology and Comparative Anatomy in the French National Museum of Natural History, Paris.

A reconstruction of Aorun, a small coelurosaurian theropod from the Middle Jurassic China.

Partial skull of Manidens condorensis from the Middle Jurassic Cañadón Asfalto Formation of Argentina. Skull reconstructions in lateral view. Dashed lines indicate estimated edges. Abbreviations: a angular antfo antorbital fossa asaf anterior surangular foramen be buccal emargination bo basioccipital bt basal tubera d dentary d1, 2, 11 dentary tooth 1, 2, 11 emfo external mandibular fossa f frontal gl glenoid gr groove j jugal jfl jugal flange jh jugal horn m maxilla m1, 11 maxillary tooth 1, 11 n nasal pd predentary pm premaxilla po postorbital pof postorbital fossa popr paroccipital process q quadrate qj quadratojugal ri ridge sa surangular sq squamosal.

Ophthalmosaurus icenius, from the time of the Callovian period of the Middle Jurassic. This specimen was found in Oxford Clay, in Peterborough, England. Photo lightly touched up to remove lighting flares.

Ophthalmosaurus icenius, from the time of the Callovian period of the Middle Jurassic. This specimen was found in Oxford Clay, in Peterborough, England. Photo lightly touched up to remove lighting flares.

Ophthalmosaurus icenius, from the time of the Callovian period of the Middle Jurassic. This specimen was found in Oxford Clay, in Peterborough, England. Photo lightly touched up to remove lighting flares.

Ophthalmosaurus icenius, from the time of the Callovian period of the Middle Jurassic. This specimen was found in Oxford Clay, in Peterborough, England. Photo lightly touched up to remove lighting flares.