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Showing results for tags 'ankylosaurus magniventris'.
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Identification Teeth of Nodosaurids are often confused for those of their rarer relatives, the Ankylosaurids, namely the archetypical Ankylosaurian, Ankylosaurus. (Most) teeth of Ankylosaurus are taller than they are wide, are generally conical in shape with one side flatter than the other, have large denticles on the anterior and posterior edges (6-8 anterior, 5-7 posterior), and have swollen/bulbous bases. Tooth wear is normally on the crown face, compared to wear on the tip (apex) as in Nodosaurids.1,2 Comments This tooth is partially rooted; the root is cylindrical and hollow. There is a wear facet on one side, offset from the center, with grooves roughly perpendicular to the apicobasal axis (suggestive of the mastication motion). This tooth was found in the same county as the holotype of this species. References 1. Carpenter, K. "Redescription of Ankylosaurus magniventris Brown 1908 (Ankylosauridae) from the Upper Cretaceous of the Western Interior of North America." Canadian Journal of Earth Sciences (2004), 41(8): 961-986. https://doi.org/10.1139/e04-043 2. Carpenter, K. "Baby dinosaurs from the Lance and Hell Creek formations and a description of a new theropod." Contributions to Geology (1982), 20: 123–134.
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From the album: Hell Creek / Lance Formations
One of my favorites as a kid - the archetypical Ankylosaurian - Ankylosaurus. Ankylosaurus teeth appear to be fairly uncommon in Hell Creek - some paleontologists have suggested that Ankylosaurus may have lived in the highlands or nearer the coast of Laramidia. Most "Ankylosaurus" teeth you see for sale are actually Nodosaurid (cf. Denversaurus), for whatever reason, they seem to be far more common. Ankylosaurus teeth also often have wear facets, as this one does. The denticles give their teeth a "leaf-like" appearance. Given their shorter stature, Ankylosaurians probably were low-browsers. This one was found by a rancher last year, and was rediscovered and prepped out of the matrix in October.- 1 comment
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From the album: Dinosaurs
A rare tooth from the Hell Creek formation. Curiously most Ankylosaurian teeth you see online are actually Nodosaurid. This one is the Ankylosaurus.-
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From the album: Hell Creek / Lance Formations
The denticles and enamel of this Ankylosaurus tooth are exceedingly well-preserved.-
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Hello fellow fossil fans! I've recently purchased this tooth online and I'm struggling to determine whether it is actually an Ankylosaurus tooth (as advertised) or whether it is a Nodosaur tooth instead. The description is as follows: "0.5" ANKYLOSAURUS FOSSIL TOOTH LANCE CREEK FM CRETACEOUS DINOSAUR WY COA & DISPLAY Location: Lance Creek Formation, Wyoming (Private Land Origin) Weight: 0.2 Ounces Dimensions: 0.5 Inches Long 0.4 Inches Wide, 0.2 Inches Thick" I would really appreciate anyones help to figure this out!
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Any interest in Ankylosaurus magniventris? Attached find a cool article on this armored dinosaur http://www.facetsjournal.com/doi/10.1139/facets-2017-0063
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