HOME | DD

Description

Claosaurus agilis
Named by Othniel Charles Marsh, 1872 (Originally a Hadrosaurus species, but got its own genus in 1890 by Marsh himself)
Diet: Herbivore
Type: Ornithopod hadrosauromorph dinosaur
Size: 11.5 feet (3.5 meters) long and 475 kilograms
Region: North America (Kansas USA)
Age: Late Cretaceous (87 to 82 million BC; Early Coniacian to Early Campanian)
Episode: Sea Monsters-The Most Dangerous Sea Ever (appeared only in the companion book, Sea Monsters: Prehistoric Predators of the Deep, but absent in the actual series, although it was mentioned as “duckbills”)
Info: Known from partial skull fragments and an articulated postcranial skeleton found in marine deposits near Smokey Hill River in Kansas (Niobrara Formation), Claosaurus was a primitive hadrosaurian dinosaur that was small by hadrosaurian standards as it was nearly the length of a rhinoceros (some of the more advanced later hadrosaurs were around 3 to 5 times larger) and lived in the coastal region of the Western Interior Seaway of North America in what is now Kansas during the Late Cretaceous period. Originally a primitive member of the hadrosaurid family, an analysis in 2008 found that Claosaurus to be outside of the hadrosaurid clade, making it the closest not-hadrosaurid relative of true hadrosaurids within the clade hadrosauria.

Note: Because this dinosaur is known from fragmentary remains I based it on upload.wikimedia.org/wikipedia… and head I based on other hadrosauromorphs such as Eolambia sorta as it is considered one. Colouration based on the hadrosaur that appeared on the Chicago episode of the Discovery Channel series Prehistoric. Also I drew it eating a crab, based on a recent discovery of crab shells found along with plant remains in the coptrolite (fossil dung) thought to be from a hadrosaur from Campanian age Utah, showing that these dinosaurs would've fed on crustaceans for protein in addition to vegetation (www.drneurosaurus.com/2017/10/… )

Well its been a long time waiting hasn't it, because I was busy and stuff.

I know this animal never appeared in Sea Monsters, but it did appear in the companion book (though no picture of it shown) as it states in the second page of the Cretaceous chapter, "North America is a great place to find some of the best-known of them (dinosaurs): the duckbills, the raptors, the armoured ankylosaurs, and good old tyrannosaurus rex. It's quite possible to see them wandering down the beach, but a certain times of year a far more likely sight is gathering of big ugly birds (Hesperornis)."
So I choose Claosaurus to be the "duckbill" as it was found in the same area, age (slightly), and fauna.

Requested by

Walking with Dinosaurs and Sea Monsters is owned by BBC and Impossible Pictures

Description

Claosaurus agilis
Named by Othniel Charles Marsh, 1872 (Originally a Hadrosaurus species, but got its own genus in 1890 by Marsh himself)
Diet: Herbivore
Type: Ornithopod hadrosauromorph dinosaur
Size: 11.5 feet (3.5 meters) long and 475 kilograms
Region: North America (Kansas USA)
Age: Late Cretaceous (87 to 82 million BC; Early Coniacian to Early Campanian)
Episode: Sea Monsters-The Most Dangerous Sea Ever (appeared only in the companion book, Sea Monsters: Prehistoric Predators of the Deep, but absent in the actual series, although it was mentioned as “duckbills”)
Info: Known from partial skull fragments and an articulated postcranial skeleton found in marine deposits near Smokey Hill River in Kansas (Niobrara Formation), Claosaurus was a primitive hadrosaurian dinosaur that was small by hadrosaurian standards as it was nearly the length of a rhinoceros (some of the more advanced later hadrosaurs were around 3 to 5 times larger) and lived in the coastal region of the Western Interior Seaway of North America in what is now Kansas during the Late Cretaceous period. Originally a primitive member of the hadrosaurid family, an analysis in 2008 found that Claosaurus to be outside of the hadrosaurid clade, making it the closest not-hadrosaurid relative of true hadrosaurids within the clade hadrosauria.

Note: Because this dinosaur is known from fragmentary remains I based it on upload.wikimedia.org/wikipedia… and head I based on other hadrosauromorphs such as Eolambia sorta as it is considered one. Colouration based on the hadrosaur that appeared on the Chicago episode of the Discovery Channel series Prehistoric. Also I drew it eating a crab, based on a recent discovery of crab shells found along with plant remains in the coptrolite (fossil dung) thought to be from a hadrosaur from Campanian age Utah, showing that these dinosaurs would've fed on crustaceans for protein in addition to vegetation (www.drneurosaurus.com/2017/10/… )

Well its been a long time waiting hasn't it, because I was busy and stuff.

I know this animal never appeared in Sea Monsters, but it did appear in the companion book (though no picture of it shown) as it states in the second page of the Cretaceous chapter, "North America is a great place to find some of the best-known of them (dinosaurs): the duckbills, the raptors, the armoured ankylosaurs, and good old tyrannosaurus rex. It's quite possible to see them wandering down the beach, but a certain times of year a far more likely sight is gathering of big ugly birds (Hesperornis)."
So I choose Claosaurus to be the "duckbill" as it was found in the same area, age (slightly), and fauna.

Requested by

Walking with Dinosaurs and Sea Monsters is owned by BBC and Impossible Pictures