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In the 1800's, some fossil teeth belonging to ceratopsians and hadrosaurs were discovered. They were classified under the genus Trachodon. When it was realized that the teeth did not come from one type of animal, the genus Trachodon became dubious.
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These creatures are far apart in time. Trachodon is from the Late Cretaceous and the Wooly Mammoth are from Pleistocene period.
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i think that the trachodon defended itself by its stiff tail
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Trachodon and woolly mammoths lived in different time periods. Trachodon, a type of dinosaur, lived during the Late Cretaceous period around 70 million years ago, while woolly mammoths lived during the Pleistocene epoch around 2 million years ago. Their existence did not overlap, so their fossils would not be found together.
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Tyrannosaurus is a carnivore. Stegosaurus is considered an armored dinosaur, although its plates were probably minimally effective as armor. Trachodon was a hadrosaur, or duck billed dinosaur. Thus, the incorrect pairing is horned dinosaur and Diplodocus. Diplodocus didn't have any horns.
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Diplodocus did not have a horn. Diplodocus was a sauropod walking on all four limbs with an extremely long neck and tail.
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Aerosteon
Alocodon
Amygdalodon
Anatotitan
Apatodon
Astrodon
Aublysodon
Bagaraatan
Baurutitan
Bonatitan
Brachytrachelopan
Cardiodon
Craspedodon
Dakotadon
Deinodon
Didanodon
Diplotomodon
Dollodon
Dongbeititan
Echinodon
Gobititan
Gondwanatitan
Huangheititan
Hypsilophodon
Iguanodon
Koparion
Lophorhothon
Lusotitan
Macrodontophion
Mochlodon
Notohypsilophodon
Olorotitan
Owenodon
Paludititan
Paralititan
Paranthodon
Pararhabdodon
Paronychodon
Phyllodon
Poekilopleuron
Priconodon
Prodeinodon
Rhabdodon
Sauroposeidon
Talenkauen
Trachodon
Trimucrodon
Tyrannotitan
Uberabatitan
Urbacodon
Vulcanodon
Wintonotitan
Xenoposeidon
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"Duckbill" is a vernacular term for Hadrosauridae, a large family of herbivorous dinosaurs, with many different species.
Hadrosauroids
Bactrosaurus
Cedrorestes
Eolambia
Gilmoreosaurus
Levnesovia
Protohadros
Tanius
Hadrosaurids (valid genera)
Amurosaurus
Anasazisaurus
Anatotitan
Angulomastacator
Aralosaurus
Arenysaurus
Barsboldia
Brachylophosaurus
Charonosaurus
Claosaurus
Corythosaurus
Edmonotosaurus
Gryposaurus
Hypacrosaurus
Hypsibema
Jaxartosaurus
Kerberosaurus
Koutalisaurus
Lambeosaurus
Lophorhothon
Maiasaura
Naashoibitosaurus
Nanningosaurus
Nipponosaurus
Olorotitan
Pararhabdodon
Parasaurolophus
Prosaurolophus
Sahaliyania
Saurolophus
Secernosaurus
Shantungosaurus
Telmatosaurus
Tethyshadros
Tsintaosaurus
Velafrons
Wulagasaurus
Zhuchengosaurus
Hadrosaurids (dubious genera)
Arstanosaurus
Cionodon
Diclonius
Hadrosaurus
Hypsibema
Mandschurosaurus
Microhadrosaurus
Orthomerus
Thespesius
Trachodon
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No. Dinosaurs never swam and never flew. Some would enter shallow water to catch prey and possibly bathe, but were not adapted for life in the water.
Don't get confused with animals like Plesiosaurs or Mosasuars, both of which are reptiles NOT dinosaurs. These reptiles did live at the same time as dinosaurs (throughout the Cretaceous).
Remember: All dinosaurs were reptiles, but not all reptiles were dinosaurs. There were marine reptiles and flying reptiles that lived at the same time as dinosaurs.
----------------------------------------------------------------------That's not exactly right. If the questioner means were there any aquatic dinosaurs, then the answer is correct. However, he's asking if any dinosaurs swam, I think some of the hadrosaurs did - maybe to the extent that modern muskrats do. There's pretty good fossil evidence that indicates some of these animals (Trachodon for e.g.) had webbed feet, which would suggest they weren't afraid to get their feet wet. As noted above, the only truly aquatic reptiles that lived during the age of dinosaurs were plesiosaurs, ichthyosaurs, and mosasaurs. The mosasaurs were just huge Varanid lizards, as the above answer notes. I'm not sure how the plesiosaurs or ichthyosaurs are currently classified, but they're definitely not dinosaurs.
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