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Paddlefish have been referred to as "primitive fish" because the Acipenseriformes are among the earliest diverging lineages of ray-finned fish, having diverged from all other living groups over 300 million years ago. Both living and fossil paddlefish are found almost exclusively in North America and China. [5]
Adult American paddlefish are actually toothless, although numerous small teeth less than 1 mm (0.039 in) were found in a juvenile paddlefish measuring 630 mm (25 in). The name spathula references the elongated, paddle-shaped snout or rostrum.
The Chinese paddlefish (Psephurus gladius; simplified Chinese: 白鲟; traditional Chinese: 白鱘; pinyin: báixún: literal translation: "white sturgeon"), also known as the Chinese swordfish, is an extinct species of fish that was formerly native to the Yangtze and Yellow River basins in China.
The estimated time of the divergence between sturgeons and paddlefish varies. An estimate based on 30 protein-encoding nuclear markers suggest 204.1 million years ago, research on mitochondrial genomes suggest 155.2 million years ago, and Bayesian dating based on the combined matrix of molecular (mitogenomes) and morphological characters set ...
The whopper you haul in well might be one of Minnesota's largest native fish, a paddlefish. "It was not my intention to catch one; I wanted to catch walleyes," said Jared Holland, of St. Peter ...
The paddlefish had likely been suffering for a very long time, a fishing guide said. Fishermen save fish from surprising, painful situation. ‘Probably happy to be caught’
Family Polyodontidae (Paddlefish) American paddlefish (Polyodon spathula) ... Silver carp have been found in the Kansas, Missouri, and Nemaha River systems [3]
The American paddlefish is one of the largest freshwater fish in North America. Closely related to the sturgeon, it is one of only two extant taxa in the paddlefish family (the other being the Chinese paddlefish). Fossil records of paddlefish date back over 300 million years, nearly 50 million years before dinosaurs appeared.