Definitions

Jiufotang_Formation

Jiufotang Formation

The Jiufotang Formation is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms. (see Jehol Biota). It is a member of the Jehol group. The exact age of the Jiufotang has been debated for years, with estimates ranging from the Late Jurassic to the Early Cretaceous. He et al. (2004) used argon - isotope radiometry to confirm biostratigraphic age estimates. They confirmed an Early Cretaceous, Aptian age for the Jiufotang Formation, 120.3 +/-0.7 million years ago. Fossils of Microraptor and Jeholornis are from the Jiufotang.

Fauna

Birds and other theropods

Birds and other theropod dinosaurs of the Jiufotang Formation
Taxa Presence Description Images
Genus:

An enantiornithine.

Genus:

An ornithuran.
Genus:

A primitive short-tailed bird (pygostylian).
Genus:

An enantirontihine.
Genus:

A long-tailed, basal avian.
Genus:

A long-tailed bird similar to Jeholornis.
Genus:

An enantirontihine.
Genus:

An enantirontihine.
Genus:

A possible enantiornithine.
Genus:

  • From the Shangheshou Beds, extremely common.
  • (Placeholder).
  • A dromaeosaurid.
    Genus:

    An omnivoropterygiform, a primitive short-tailed bird.
    Genus:

    An oviraptorosaur.
    Genus:

    An enantiornithine.
    Genus:

    An ornithuran.
    Genus:

    An ornithuran.
    Genus:

    An ornithuran.

    Choristoderans

    Choristoderans of the Jiufotang Formation
    Taxa Presence Description Images
    Genus:

    Fish

    Fish of the Yixian Formation
    Taxa Presence Description Images
    Genus:

    An osteoglossiform.

    Genus:

    • Lycoptera.
    • Lycoptera davidi
    • Lycoptera muroii

    An osteoglossiform.
    Genus:

    A fish related to Sturgeons.
    Genus:

    A Paddlefish.
    Genus:

    A Bowfin.

    Ornithischians

    Ornithischian dinosaurs of the Yixian Formation
    Taxa Presence Description Images
    Genus:

    1. From the Shangheshou Beds, extremely common.
    2. (Placeholder).

    A ceratopsian.

    Pterosaurs

    Pterosaurs of the Jiufotang Formation
    Taxa Presence Description Images
    Genus:

    A chaoyangopterid.

    Genus:

    A chaoyangopterid.
    Genus:

    A chaoyangopterid.
    Genus:

    • Huaxiapterus
    • Huaxiapterus benxiensis
    • Huaxiapterus corollatus
    • Huaxiapterus jii

    A tapejarid.
    Genus:

    A chaoyangopterid.
    Genus:

    An ornithocheirid.
    Genus:

    An istiodactylid.
    Genus:

    An istiodactylid.
    Genus:

    A tapejarid.

    Sauropods

    Sauropod dinosaurs of the Yixian Formation
    Taxa Presence Description Images
    Unranked:

    An unnamed species of titanosaur.

    See also

    References

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