''Tinodon'' is an extinct genus of mammal alive 155–140.2 million years ago ( Oxfordian-

Berriasian In the geological timescale, the Berriasian is an age/stage of the Early/Lower Cretaceous. It is the oldest subdivision in the entire Cretaceous. It has been taken to span the time between 145.0 ± 4.0 Ma and 139.8 ± 3.0 Ma (million years ago) ...

) which has been found in the

Morrison Formation The Morrison Formation is a distinctive sequence of Late Jurassic, Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandsto ...

( United States),Foster, J. (2007). "Appendix." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. ''Indiana University Press.'' pp. 327-329. the

Alcobaça Formation The Alcobaça Formation, previously known as the Guimarota Formation and also known as the Consolação Unit, is a geological formation in Portugal. It dates back to the Kimmeridgian stage of the Late Jurassic. It is an important source of informa ...

( Portugal) and the Lulworth Formation ( England). It is of uncertain affinities, being most recently recovered as closer to therians than eutriconodonts but less so than allotherians.S. Bi, Y. Wang, J. Guan, Z. Sheng, and J. Meng. 2014. Three new Jurassic euharamiyidan species reinforce early divergence of mammals. ''Nature'' 514:579-584 . Mannion/J. Tennant/ref> Two species are known: ''T. bellus'' (Marsh, 1879) and ''T. micron'' (Ensom & Sigogneau-Russell, 2000P. Ensom and D. Sigogneau-Russell. 2000. New symmetrodonts (Mammalia, Theria) from the Purbeck Limestone Group, Lower Cretaceous, southern England. ''Cretaceous Research'' 21:767-779).

References

Morrison mammals Taxa named by Othniel Charles Marsh Fossil taxa described in 1879 Prehistoric mammal genera {{jurassic-mammal-stub

See also

References