Bonnerichthys
| Bonnerichthys Temporal range: Late Cretaceous, | |
|---|---|
| Restoration | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | †Pachycormiformes |
| Family: | †Pachycormidae |
| Genus: | †Bonnerichthys Friedman et al., 2010 |
| Species: | †B. gladius |
| Binomial name | |
| †Bonnerichthys gladius (Cope, 1873) | |
| Synonyms | |
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Bonnerichthys is a genus of fossil fishes within the family Pachycormidae that lived during the Coniacian to Maastrichtian stage of the Late Cretaceous. Fossil remains of this taxon were first described from the Smoky Hill Member of the Niobrara Chalk Formation of Kansas (Late Coniacian-Early Campanian), and additional material was later reported from the Pierre Shale, Mooreville Chalk, Demopolis Chalk, Wenonah Formation, and Moreno Formation, among other localities. It has also been reported in European Russia, specifically from the Rybushka Formation of the Saratov Region. It grew to at least 5 metres (16 ft) in total body length, substantially less than the related Leedsichthys from the Jurassic which likely grew up to 16.5 metres (54 ft).