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Fossil fish trivia |
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-Lycoptera: They were formed more than 120 million years ago in a lake bed formation in Bei Piao, Lioaning. China. ( Lioaning is a province in the north-east China ) -Dastilbe elongatus fish: Romualdo, Crato, Cearà, Brazil Formation: Crato Mbr., Santana Fm. Age: Lower Cretaceous (Aptian), about 110 million years old -Knightia eocena : a herring like fish it is one of the more common fossil fish found in the Green River Formation. Specimens have been found measuring up to 25 centimeters in length (about 10 inches). Numerous Mass Mortality Plates demonstrate that this Lake Fish probably swam in schools closely related to today's Clupea, herrings -- lived, and prospered about 50 million years ago in freshwater lakes, which are now southwestern Wyoming. Much about their extinction remains a mystery, we do know, however, that they died very suddenly, in large groups. Poisonous volcanic gases, temperature fluctuations, food supply shortages, and algae blooms are conditions which have been condusive to killling modern fish populations. Thus scientists speculate that one or more of these scenarios may have caused Knightia's sudden demise.. -Dunkleosteus is a Late Devonian Placoderm Armored Fish from Morocco. This armour plated fish grew to some 20 feet. Dunkleosteus was one of the earliest jawed vertebrates, and one of the largest of the armored fishes called placoderms. It grew to some 30 feet in length. Violent predator may be an understatement for Dunkleosteus and its cousins. While lacking true teeth, it had two long and bony blades that acted like self-sharpening blades could slice and dice most anything, which apparently it did. The fossil record shows regurgitated, semi-digested remains of fish suggesting it participated in the deadly sin of gluttony indigestion as a result: its fossils are often associated with regurgitated, semi-digested remains of fish. The Placondermi family evolved in the Silurian and perished in the late Devonian, leaving no descendants living today. Their appearance and disappearance has been likened to an early failed evolutionary experience. As fierce as they were they persisted only 50 million years, which pales in comparison with the 400 million years history of sharks.Some researchers believe Dunkleosteus may have been among the earliest animals that physically mated as male and female. The appearance of the placoderms has been likened to an early failed evolutionary experience. As fierce as they were they persisted only 50 million years, which pales in comparison with the 400 million years history of sharks |
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