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Oxfordian

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The Oxfordian stage is the first stage of the Late Jurassic Epoch. It spans the time between 161.2 ± 4 Ma and 155.7 ± 4 Ma (million years ago).

The stage takes its name from the city of Oxford in England.

Vertebrate FaunaEdit

OrnithischiansEdit

Ornithischians of the Oxfordian
Taxa Presence Location Description Images
Oxfordian? Tithonian? Chaoyang, Liaoning, China A marginocephalian dinosaur from the Late Jurassic of China, belonged to the Ceratopsia, a group of primarily herbivorous dinosaurs with parrot-like beaks
Chaoyangsaurus BW

Chaoyangsaurus

Chialingosaurus BW

Chialingosaurus

Chungkingosaurus jiangbeiensis

Chungkingosaurus

Dacentrurus

Dacentrurus

Tuojiangosaurus

Tuojiangosaurus

Yinlong BW

Yinlong

Upper Shaximiao Formation, Sichuan, China A genus of stegosaur similar to Kentrosaurus
Upper Shaximiao Formation, Sichuan, China One of the smallest of the stegosaurids at 3-4 metres long (10-13 ft), Chungkingosaurus had at least five spikes on its thagomizer. It had a rather high and narrow skull and large, thick bony plates.
England, France, Spain, Portugal A large stegosaurid
Shishugou Formation, Xinjiang, China Either a hypsilophodont, or a less-derived ornithischian
Dashanpu Formation, Sichuan, China By extrapolation from the remains of possible species and other basal ornithopods, it was a herbivorous bipedal animal around 1.3 to 1.5 meters long (4.3 to 4.9 ft). It would have been a strong runner
Junggar Basin, Xinjiang, China A genus of stegosaurid
Upper Shaximiao Formation, Sichuan, China The best understood of the Chinese stegosaurs. It was around 7.0 meters (23 ft) long and 2 meters (7 ft) high, with a postulated weight of around 4 metric tons (4.4 short tons).
Shishugou Formation, Xinjiang, China A small, primarily bipedal herbivore, approximately 1.2 meters (4 ft) long, the oldest and most primitive ceratopsian known to science.

ThalattosuchiansEdit

Thalattosuchians of the Oxfordian
Taxa Presence Location Description Images
Geosaurus BW

Geosaurus

Metriorhynchus BW

Metriorhynchus, a marine crocodilian.

An opportunistic carnivore that fed on fish, belemnites and other marine animals and possible carrion. Metriorhynchus grew to an average adult length of 3 meters (9.6 feet), although some individuals may have reached lengths rivaling those of large nile crocodiles.

TheropodsEdit

Theropoda of the Oxfordian
Taxa Presence Location Description Images
Upper Shaximiao Formation, Sichuan, China Yangchuanosaurus shangyouensis reached about 7 metres long (23 ft) with a skull around 80 cm long (32 in). Its relative Y. magnus grew larger still: up to 10 metres long (33 ft) with a skull up to 1 metre (3 ft) in length. There was a bony knob on its nose and multiple hornlets and ridges, similar to Ceratosaurus. It had a massive tail that was about half its length.
Yanchuanosaurus1

Yangchuanosaurus

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Invertebrate FaunaEdit

NautiloidsEdit

Nautiloids of the Oxfordian
Taxa Presence Location Description Images
  • Somalinautilus
Cameroceras trentonese

An illustration of a variety of fossil nautiloids.

BelemnitesEdit

Belemnites of the Oxfordian
Taxa Presence Location Description Images
Belmnites

Small belemnite fossils

References Edit

Jurassic period
Lower/Early Jurassic
Middle Jurassic
Upper/Late Jurassic
Hettangian | Sinemurian
Pliensbachian | Toarcian
Aalenian | Bajocian
Bathonian | Callovian
Oxfordian | Kimmeridgian
Tithonian


Geological time spiral

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