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  • Protopsephurus liui Lu, 1994


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    • The order of Acipenseriformes (Sturgeon-like fishes) both includes sturgeons (Acipenseridae) and paddlefish (Polyodontidae).

      At least three Sturgeon-like fishes (Acipenseriformes) can be found in the Jiufotang Formation (Jehol Group) and in the Yixian Formation in western Liaoning and northern Hebei Province China: Peipiaosteus pani Liu and Zhou, 1965, Protopsephurus liui Lu, 1994 and Yanosteus longidorsalis Jin, Tian, Yang & Deng, 1995. The Jiufotang Formation - where Peipiaosteus comes from - is dated to about 120.3+/-0.7 million years ago, which was during the Aptian age of the Cretaceous; the Yixian Formation - where this Protopsephurus liui and Y. longidorsalis can be found - is dated slightly older, around 125-121 million years ago (Barremian-early Aptian).
       

      Protopsephurus liui Lu 1994 is both the oldest and the most primitive paddlefish (Polyodontidae) known. Paddlefishes remain one of the strongest indicators of historical biogeographic connection between East Asia and North America. Fossil and living members of this family date from the Early Cretaceous and Recent in China, and from the Late Cretaceous, Early Paleocene, Early Eocene and Recent in North America. The total length of Protopsephurus normally is in the range of 20 to 30cm, but can exceed 1m.

       

      Lit.:

      Lu, L. (1994): A new paddlefish from the Upper Jurassic of Northeast China. Vertebrata PalAsiatica, 1994, Vol. 32, Teil 2, pp134-142 
      Liu, H., Zhou J. (1965): A new Sturgeon from the Upper Jurassic of Liaoning, North China. Vertebrata PalAsiatica Vol. 9, No. 3, 1965, p. 237 ff.

      Zhou, Z.(1992): Review on Peipiaosteus based on new materials of P. pani. Vertebrata PalAsiatica Vol 30, No. 2, pp 85-101. 

       

    Taxonomy

    Paddlefish

    Kingdom: Animalia
    Phylum: Chordata
    Class: Actinopterygii
    Order: Acipenseriformes
    Family: Polyodontidae
    Genus: Protopsephurus
    Species: P. liui
    Author Citation Lu, 1994

    Geological Time Scale

    Eon: Phanerozoic
    Era: Mesozoic
    Period: Cretaceous
    Epoch: Early
    International Age: Barremian - Early Aptian

    Stratigraphy

    Yixian Formation

    Provenance

    Acquired by: Purchase/Trade

    Location

    Songzhangzi
    Lingyuan County
    Liaoning
    China

    Comments

    The order of Acipenseriformes (Sturgeon-like fishes) both includes sturgeons (Acipenseridae) and paddlefish (Polyodontidae).

    At least three Sturgeon-like fishes (Acipenseriformes) can be found in the Jiufotang Formation (Jehol Group) and in the Yixian Formation in western Liaoning and northern Hebei Province China: Peipiaosteus pani Liu and Zhou, 1965, Protopsephurus liui Lu, 1994 and Yanosteus longidorsalis Jin, Tian, Yang & Deng, 1995. The Jiufotang Formation - where Peipiaosteus comes from - is dated to about 120.3+/-0.7 million years ago, which was during the Aptian age of the Cretaceous; the Yixian Formation - where this Protopsephurus liui and Y. longidorsalis can be found - is dated slightly older, around 125-121 million years ago (Barremian-early Aptian).
     

    Protopsephurus liui Lu 1994 is both the oldest and the most primitive paddlefish (Polyodontidae) known. Paddlefishes remain one of the strongest indicators of historical biogeographic connection between East Asia and North America. Fossil and living members of this family date from the Early Cretaceous and Recent in China, and from the Late Cretaceous, Early Paleocene, Early Eocene and Recent in North America. The total length of Protopsephurus normally is in the range of 20 to 30cm, but can exceed 1m.

     

    Lit.:

    Lu, L. (1994): A new paddlefish from the Upper Jurassic of Northeast China. Vertebrata PalAsiatica, 1994, Vol. 32, Teil 2, pp134-142 
    Liu, H., Zhou J. (1965): A new Sturgeon from the Upper Jurassic of Liaoning, North China. Vertebrata PalAsiatica Vol. 9, No. 3, 1965, p. 237 ff.

    Zhou, Z.(1992): Review on Peipiaosteus based on new materials of P. pani. Vertebrata PalAsiatica Vol 30, No. 2, pp 85-101. 

     



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