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Named By: Edward Drinker Cope in 1873
Time Period: Late Cretaceous, 87-81 Ma
Location: USA
Size: Up to about 6 meters long
Diet: Planktonic filter feeder
Fossil(s): Partial remains
Classification: | Chordata | Actinopterygii | Pachycormiformes | Pachycormidae |
Also known as: | Portheus gladius | Protosphyraena gladius |

Bonnerichthys is a genus of fossil fishes within the family Pachycormidae that lived during the Late Cretaceous Period Fossil remains of this taxon are known from the Smoky Hill Member of the Niobrara Chalk Formation of Kansas (Late Coniacian-Early Campanian, about 87-81 million years ago). It grew to around 20 feet in length, though not quite as large as the related Leedsichthys from the Jurassic of Europe which likely grew up to 30 feet.

Read more about Bonnerichthys at Wikipedia
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