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Showing results for tags 'metatheria'.
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From the album: Hell Creek Formation Microsite
Mammals are always a joy to find - a rooted marsupial lower premolar.-
- cretaceous mammal
- hell creek
- (and 6 more)
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From the album: Hell Creek / Lance Formations
Among the iridescent mollusk shell shrapnel, lies a molar from a small Cretaceous mammal.-
- alphadon
- cretaceous mammal
- (and 10 more)
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From the album: Hell Creek / Lance Formations
A mammal tooth from the group that includes the marsupials. Found in a channel deposit, it's remarkable that the roots are still intact.-
- alphadon
- cretaceous mammal
- (and 8 more)
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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 differences between metatherian and eutherian upper molars are that metatherians have more small cusps on the outer side (labial) of the occlusal surface of the tooth and have a front to back (mesiodistal) longer tooth." https://naturalhistory.si.edu/sites/default/files/media/file/fossil-id-guide062812-accessible.pdf
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- aguja
- aguja formation
- (and 8 more)
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From the album: Aguja Formation
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- aguja
- aguja formation
- (and 6 more)