Dinosaurs That Start With J
Explore a complete list of over 20 dinosaurs that start with the letter J.
Each dinosaur listed has a dedicated page with information on classification, diet, size, fossil evidence, geographic distribution, and maps of known fossil locations, where available. Pages may also include size comparison charts, fossil representations, and in-depth descriptions based on current scientific research.
The amount of information varies by species, depending on the completeness of fossil discoveries.
Diet: Herbivore.Size: Estimated at†‬18†‬meters long.Time Period: Maastrichtian of the Cretaceous.
Diet: Herbivore.Size: Uncertain due to lack of fossil remains.Time Period: Towards the end of the Early Cretaceous.
Diet: Herbivore.Size: Uncertain due to lack of remains,†‬but size
estimates have ranged from†‬15-24†‬meters long.Time Period: Kimmeridgian to Tithonian of the
Jurassic.
Diet: Herbivore.Size: Uncertain due to lack of fossils.Time Period: Coniacian/Santonian of the Cretaceous.
Diet: Possibly omnivorous.Size: Holotype 71 centimetres long, but this is of a
juvenile. Adult size uncertain.Time Period: Barremian of the Cretaceous.
Diet: Herbivore.Size: 6 meters long.Time Period: Turonian of the Cretaceous.
Diet: Herbivore.Size: Uncertain,†‬due to lack of remains,†‬but in
the past has been roughly estimated to be around the†‬6†‬meters mark.Time Period: Oxfordian of the Jurassic.
Diet: Herbivore.Size: Unavailable.Time Period: Albian of the Cretaceous.
Diet: Uncertain/Omnivore�Size: Skull†‬15†‬centimetres long.†‬Roughly
estimated at about†‬1.5†‬meters long,†‬though this is of a
subadult.†‬Fully grown adults were slightly a little bit larger.Time Period: Maastrichtian of the Cretaceous.
Diet: Carnivore.Size: Estimated reconstructed size of the holotype
individual about†‬1.12†‬meters long.Time Period: Early Cretaceous.
Diet: Carnivore.Size: Uncertain due to lack of remains,†‬but very
roughly estimated to be somewhere around†‬5.5†‬meters long for the
holotype individual.Time Period: Late Cretaceous.
Diet: Carnivore�Size: About†‬55†‬centimetres long.Time Period: Barremian/Aptian� ‬of the Cretaceous.
Diet: Herbivore.Size: Unknown.Time Period: Aptian of the Cretaceous.
Diet: Herbivore.Size: Unavailable.Time Period: Albian/Cenomanian of the Cretaceous.
Diet: Herbivore.Size: Roughly about†‬7†‬meters long.Time Period: Aptian of the Cretaceous.
Diet: Herbivore.Size: Unknown.Time Period: Cretaceous.
Diet: Herbivore.Size: Estimated about 21 ‬meters long.Time Period: Initially considered to be of the
Hauterivian to Barremian ages of the early Cretaceous,†‬further study
of the sediments at the Tiouraren formation suggest that they actually
represent the Bathonian to Oxfordian stages of the mid Jurassic.
Diet: Herbivore.Size: Unknown due to lack of remains.Time Period: Campanian of the Cretaceous.
Diet: Carnivore.Size: For holotype individual, femur (upper leg
bone) about 55 centimetres
long, tibia
(lower leg bone) about 68 centimetres long. Total body length roughly
estimated to be about 5†‬meters long.Time Period: Tithonian of the Jurassic.
Diet: Carnivore/Insectivore.Size: 70†‬centimetres long.Time Period: Kimmeridgian of the Jurassic.
