Bathonian

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In the geologic timescale the Bathonian epoch is a stage during the Middle Jurassic, of the Mesozoic era of the Phanerozoic eon. It lasted from approximately 167.7 Ma to around 164.7 Ma (million years ago). The Bathonian age succeeds the Bajocian age and precedes the Callovian age.

The stage takes its name from Bath, a spa town in England built on Jurassic limestone.

Contents

[edit] Vertebrate Fauna

[edit] Ankylosaurs

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Ankylosaurs of the Bathonian
Taxa Presence Location Description Images
  • Tianchisaurus nedegoapeferima
 A Chinese ankylosaur which lacked a club at the end of its tail. Its species epithet honors the main actors of Jurassic Park.

[edit] Crocodylomorphs

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Crocodylomorphs of the Bathonian
Taxa Presence Location Description Images
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.
Teleidosaurus, a marine crocodilian (Thalattosuchian).
Teleidosaurus, a marine crocodilian (Thalattosuchian).
The most plesiomorphic known metriorhynchid.

[edit] Ornithopods

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Ornithopods of the Bathonian
Taxa Presence Location Description Images
  • Agilisaurus louderbacki
 A four foot long bipedal herbivore that was built for speed. It was discovered in one of China's many Callovian deposits.
Agilisaurus
Agilisaurus
  • Yandusaurus hongheensis
 A 5 foot long Chinese herbivore in the family hypsilophodontidae.
  • Xiaosaurus dashanpensis
 A poorly known Chinese ornithschian that may be related to Hypsilophodon and Lesothosaurus. It was small and vegetarian.

[edit] Sauropods

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Sauropods of the Bathonian
Taxa Presence Location Description Images
Abrosaurus was a small (30 foot adult length) sauropod from China with an unusual skull.
Abrosaurus
Abrosaurus
A sauropod named after the mountains where the mythological figure that held the world on his shoulders, it attained lengths of 15 meters (50 feet) and lived in Morocco.
A poorly known English sauropod with heart shaped teeth.

[edit] Theropods

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Theropods of the Bathonian
Taxa Presence Location Description Images
An 11-13 foot predator from China whose discovery was assisted by the petroleum industry.
Megalosaurus
Megalosaurus
A small, 5 foot long European carnivore related to Tyrannosaurus.
The first dinosaur to receive a formal scientific description, Megalosaurus was a 30 foot carnivore which prowled Jurassic England.
A Chinese theropod that has yet to be formally described.

[edit] Invertebrate Fauna

[edit] Ammonitida

Members of the order ammonitda are known as Ammonitic ammonites. They are distinguished primarily by their suture lines. In ammonitic suture patterns, the lobes and saddles are much subdivided (fluted) and subdivisions are usually rounded instead of saw-toothed. Ammonoids of this type are the most important species from a biostratigraphical point of view. This suture type is characteristic of Jurassic and Cretaceous ammonoids but extends back all the way to the Permian.

†Ammonitids of the Aalenian
Taxa Presence Location Description Images
Confirmed.[1] The
Life restorations of two different ammonite genera.
Life restorations of two different ammonite genera.
Confirmed.[1]
Confirmed.[1]
Confirmed.[1]
Confirmed.[1]
Confirmed.[1]
Confirmed.[1]
Confirmed.[1]
  • Parkinsonia
 Confirmed.[1]
Confirmed.[1]
  • Siemiradzkia
 Confirmed.[1]

[edit] Belemnites

Belemnites of the Bathonian
Taxa Presence Location Description Images
  • Produvalia
Small belemnite fossils
Small belemnite fossils
Jurassic period
Lower/Early Jurassic Middle Jurassic Upper/Late Jurassic
Hettangian | Sinemurian
Pliensbachian | Toarcian		 Aalenian | Bajocian
Bathonian | Callovian		 Oxfordian | Kimmeridgian
Tithonian