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Showing results for tags 'cretaceous mammal'.
Found 13 results
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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
- 4 replies
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- cretaceous mammal
- mesozoic 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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Hey y'all, recently got this Cretaceous mammal molar from the Lance Fm., Weston Co., WY. It's about 8 mm long. I'm thinking Didelphodon sp.? @jpc
- 9 replies
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- multituberculate
- cretaceous mammal
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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...
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Hey y'all, found what I think may be a Cretaceous mammal incisor. I was hoping to find some mammal teeth when I got the Aguja matrix, but since I haven't found any before, need more experienced eyes. Could very well be a piece of something else. It's about 5mm in length. Thanks!
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- aguja formation
- multituberculate
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Evolution Of Mammalian Middle Ear Bones Illuminated By Rodent-like Fossil From Jehol
Scylla posted a topic in Fossil News
New fossil with excellent preservation helps understanding of middle ear bones in early mammals. If you have a stapes, you are a mammal. https://m.phys.org/news/2019-11-cretaceous-mammal-fossil-evolution-middle.html-
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- jehol biota
- cretaceous mammal
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Possible Mammal Jaw Section W/ Teeth From Wyoming Cretaceous
WyomingRocks! posted a topic in Fossil ID
Hello, here are some not very good pictures of the specimen I think is a section of mammal jaw. From the Mesa Verde formation in Wyoming. The scale is in mm and I will try to get pictures tomorrow with the sunlight, if we have any, supposed to rain all day. Please let me know what you think of this. One tooth is complete but the other has a small piece missing it looks like. I think it is mammal but I am basing that on what the teeth look like (a present day molar in mammals). Thanks!
