Dinnetherium is an extinct genus of mammaliaforms from the Early Jurassic of Arizona. The type species, D. nezorum, was named in 1983.[1] It was discovered in a Sinemurian layer of the Kayenta Formation,[2] within the Gold Spring Quarry 1. The holotype is MNA V3221, which is a partial right mandible.[3]
| Dinnetherium Temporal range: Sinemurian
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| Lower jaws of Hadrocodium (A) and Dinnetherium (B and C) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida |
| Clade: | Cynodontia |
| Clade: | Mammaliaformes |
| Order: | †Morganucodonta |
| Family: | †Megazostrodontidae |
| Genus: | †Dinnetherium Jenkins, Crompton & Downs, 1983 |
| Species: | †D. nezorum
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| Binomial name | |
| †Dinnetherium nezorum Jenkins, Crompton & Downs, 1983
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Dinnetherium has sometimes been placed in the family Megazostrodontidae, but in 2011 the monotypic family Dinnetheriidae and order Dinnetheria were erected for the genus.[3]
Classification
editThe phylogenetic position of Dinnetherium within mammaliaforms is shown in the cladogram below:[4]
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References
edit- ^ F. A. Jenkins, Jr., A. W. Crompton, and W. R. Downs. 1983. Mesozoic mammals from Arizona: new evidence on mammalian evolution. Science 222:1233-1235
- ^ Sues H.-D., Clark J. M., et al (1994) A review of the Early Jurassic tetrapods from the Glen Canyon Group of the American Southwest., In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, N. C. Fraser and H.-D. Sues (eds.), Cambridge University Press, 284-294
- ^ a b A. O. Averianov and A. V. Lopatin. 2011. Phylogeny of Triconodonts and Symmetrodonts and the Origin of Extant Mammals. Doklady Biological Sciences 436:32-35
- ^ Montellano, M.; Hopson, J. A.; Clark, J. M. (2008). "Late Early Jurassic mammaliaforms from Huizachal Canyon, Tamaulipas, México". Journal of Vertebrate Paleontology. 28 (4): 1130–1143. doi:10.1671/0272-4634-28.4.1130.
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