The longnose sucker. These are somewhat popular with anglers in North America, and have a very broad geographic range, extending from the Arctic coastline south as far as the Delaware river drainage. The entire family Catostomidae are semi-ancient tetraploids; they all share a common ancestor that was tetraploid around 100 million years ago. Now, they're probably functionally diploid, but retain twice the number of chromosomes as most other fish.
Friday, August 25, 2006
Friday Fish: Catostomus catostomus
The longnose sucker. These are somewhat popular with anglers in North America, and have a very broad geographic range, extending from the Arctic coastline south as far as the Delaware river drainage. The entire family Catostomidae are semi-ancient tetraploids; they all share a common ancestor that was tetraploid around 100 million years ago. Now, they're probably functionally diploid, but retain twice the number of chromosomes as most other fish.
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