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Naashoibitosaurus
''Naashoibitosaurus'' (from Navajo language, Navajo —"creek lizard") is a genus of hadrosaurid dinosaur that lived about 73 million years ago, in the Late Cretaceous, and was found in the Kirtland Formation of the San Juan, New Mexico, San Juan Basin in New Mexico, United States. Only a partial skeleton has been found to date. It was first described as a specimen of ''Kritosaurus'' by Jack Horner (paleontologist), Jack Horner, and has been intertwined with ''Kritosaurus'' since its description. Description ''Naashoibitosaurus'', based as it is on a single partial skeleton (New Mexico Museum of Natural History and Science, NMMNH P-16106), is not well known in terms of anatomy. Its skull, the most thoroughly described portion, has a low nasal bone, nasal crest that peaks in front of the eyes, but does not strongly arch as in ''Gryposaurus''. Classification ''Naashoibitosaurus'' is a Saurolophinae, saurolophine hadrosaurid, a "flat-headed or solid-crested duckbill". It is clos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kritosaurus
''Kritosaurus'' is an incompletely known genus of hadrosaurid (duck-billed) dinosaur. It lived about 74.5-66 million years ago, in the Late Cretaceous of North America. The name means "separated lizard" (referring to the arrangement of the cheek bones in an incomplete type skull), but is often mistranslated as "noble lizard" in reference to the presumed "Roman nose" (in the original specimen, the nasal region was fragmented and disarticulated, and was originally restored flat). History of discovery In 1904, Barnum Brown discovered the type specimen (AMNH 5799) of ''Kritosaurus'' near the Ojo Alamo Formation, San Juan County, New Mexico, United States, while following up on a previous expedition. He initially could not definitely correlate the stratigraphy, but by 1916 was able to establish it as from what is now known as the late Campanian-age De-na-zin Member of the Kirtland Formation. When discovered, much of the front of the skull had either eroded or fragmented, and Brow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
