Protopsephurus is an extinct genus of paddlefish containing the single species Protopsephurus liui, known from the Yixian, Jiufotang and Huajiying formations...

added in Hilton et al. (2023): genus † Protopsephurus Lu, 1994 (Early Cretaceous, China) species † Protopsephurus liui Lu, 1994 genus † Pugiopsephurus Hilton...

over 190 million years ago. The oldest paddlefish fossil is that of Protopsephurus from the Early Cretaceous of China, dating to around 120 million years...

to 162 (195–137) million years ago. The oldest known paddlefish is Protopsephurus from the Early Cretaceous of China around 120 million years ago, while...

(125-120 million years ago) or prior, as the earliest fossil paddlefish (Protopsephurus) is known from then. True sturgeons appear in the fossil record during...

combination of characters which suggests that it is more derived than Protopsephurus, but is more basal than Crossopholis, Polyodon, or Psephurus. Relationships...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Ordosemys (a prehistoric species of turtle) Palaeocambarus (a crawfish) Protopsephurus (an ancient species of paddlefish) Psittacosaurus preserved in combat...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Lance; Jin, Fan; Yabumoto, Yoshitaka; Bemis, William E. (2002-07-08). "Protopsephurus liui , a well-preserved primitive paddlefish (Acipenseriformes: Polyodontidae)...

which includes all polyodontids other than the most primitive genus Protopsephurus. Like Psephurus and other extinct paddlefish genera, the genus was likely...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...

Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Boreiosturion...