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Knightia is an extinct genus of clupeid bony fish that lived in the freshwater lakes and rivers of North America and Asia during the Eocene epoch.The genus was erected by David Starr Jordan in 1907, in honor of the late University of Wyoming professor Wilbur Clinton Knight, "an indefatigable student of the paleontology of the Rocky Mountains."
The coelacanth was long considered a "living fossil" because scientists thought it was the sole remaining member of a taxon otherwise known only from fossils, with no close relatives alive, [8] and that it evolved into roughly its current form approximately 400 million years ago. [1]
The study of prehistoric fish is called paleoichthyology. A few living forms, such as the coelacanth are also referred to as prehistoric fish, or even living fossils, due to their current rarity and similarity to extinct forms. Fish which have become recently extinct are not usually referred to as prehistoric fish.
The fossilized remains of fish eggs have an extensive record going at least as far back as the Devonian and spanning into the Cenozoic era.The eggs of many different fish taxa have contributed to this record, including lobe-finned fish, placoderms, and sharks.
Oklahoma was a terrestrial environment for most of the ensuing Mesozoic era. [3] The Late Triassic Dockum Group of western Oklahoma preserved remains of archosaurs and temnospondyls, although its fossil record is restricted to a narrow region of the panhandle and is far sparser than the equivalent records in Texas, New Mexico, and Arizona. [98]
Artist's restoration of a school of Grendelius. This timeline of ichthyosaur research is a chronological listing of events in the history of paleontology focused on the ichthyosauromorphs, a group of secondarily aquatic marine reptiles whose later members superficially resembled dolphins, sharks, or swordfish.
Adult Notogoneus osculus from Fossil Butte National Monument. Specimen is 52 cm long. Notogoneus is an extinct genus of prehistoric ray-finned fish. [1] A trace fossil attributed to Notogoneus osculus has been found in the Green River Formation. [2]
Often consisting of some sweet substance, such as frosting or molasses, combined with an aromatic like rotten meat or fish, the bait is spread and the hunter waits under cover for his prey. [ 2 ] Cecil the Lion , who was infamously poached by an American trophy bowhunter in 2015, was baited out of the protected area into an ambush at the margin ...