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Showing results for tags 'mesozoic mammal'.
Found 11 results
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From the album: Hell Creek / Lance Formations
Cimolodon nitidus Hell Creek Fm., Meade Co., SD, USA M1 (1st upper molar) While you may have mistaken it for a rodent, Cimolodon belonged to a far more ancient and wildly successful group of mammals, the multituberculates (so named for the multiple cusps arranged in rows on their molars). It likely ate seeds and nuts which were handedly ground by its lego-shaped molars. Cimolodon had to be wary of the likes of Pectinodon or other small predatory dinosaurs in the Hell Creek ecosystem. Unlike a few other contemporaneous mammals, this cousin of ours did not survive the K-Pg ext-
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- cimolodon
- cimolodon nitidus
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Hi y'all, recently acquired this beautiful multituberculate. Total tooth height is 3 mm. Mesodma sp. P4? @jpc Cf. Mesodma sp. Hell Creek Fm., Garfield Co., MT, USA 3 mm
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- mesodma
- multituberculate tooth
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From the album: Hell Creek / Lance Formations
Meniscoessus was a large multituberculate mammal (large by Cretaceous standards), identified by the crescent-shaped/grooved cusps. Looks like a right M2 (right 2nd lower molar). -
Rowe, Timothy, et al. “The Campanian Terlingua Local Fauna, with a Summary of Other Vertebrates from the Aguja Formation, Trans-Pecos Texas.” Journal of Vertebrate Paleontology, vol. 12, no. 4, [Society of Vertebrate Paleontology, Taylor & Francis, Ltd.], 1992, pp. 472–93, http://www.jstor.org/stable/4523473. DeMar also has a nice description of the differentiation between eutherian/metatherian upper molars: "The upper molars of metatherians and eutherians are triangular shaped with three major cusps or bumps on the occlusal surface of the crown. The main difference
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From the album: Aguja Formation
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- aguja formation
- aguja
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Hi y'all, I found this neat mammal molar from the Aguja yesterday. My best guess is a Eutherian or Metatherian upper molar. @jpc@Troodon
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- cretaceous mammal
- mesozoic mammal
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As I continue to sift through my bag of micro matrix from the Aguja Formation, I came across this interesting little mammal tooth. It looks to me like an incisor but I suppose it could also be a canine. I am completely unfamiliar with Mesozoic mammals and I’m not even sure how far down this tooth is distinguishable, but I thought I’d post it anyway. Super excited as this is my first Mesozoic mammal tooth. Size: ~0.5cm Magnifier 20X from three different angles: Thanks for any information/resources you can point me to. As always, I deep
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- mesozoic mammal
- mammal
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From the album: Miscellaneous
Uncommon Mesozoic mammal (multituberculate) tooth from the Lance Fm. ID'd here.-
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- lance formation
- meniscoessus
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From the album: Aguja Formation
A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken. -
From the album: Aguja Formation
A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken.-
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- mesozoic mammal
- cretaceous mammal
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Found another suspected Cretaceous mammal tooth from the Aguja Fm. I've made my way to the fine matrix. This tooth is about 1 mm in length; I have no idea how I managed to find it. I unfortunately broke part of the root putting it back in the gem case I chose to store it in (after taking the pics). @jpc, what about this one? Feeling slightly more confident...
