Temporal range: Jurassic–Oligocene
160 to 35 million years ago
|Skull of Ptilodus|
Multituberculates are usually placed outside both the two main groups of living mammals, the Theria (placentals and marsupials), and monotremes. Some cladistic analyses put them closer to Theria than to monotremes.
Biology[change | change source]
The multituberculates had a head anatomy similar to rodents. They had cheek-teeth separated from the chisel-like front teeth by a wide tooth-less gap (called the diastema). Each cheek-tooth displayed several rows of small cusps (or tubercles, hence the name) which worked against similar rows in the teeth of the jaw. It was an efficient chopping device.
References[change | change source]
|Wikispecies has information on: Multituberculata.|
- Krause, David W. 1986. Competitive exclusion and taxonomic displacement in the fossil record: the case of rodents and multituberculates in North America. Contributions to Geology (Special Paper 3): 95–117.
- Weil, Anne (1997). "Introduction to Multituberculates: the “lost tribe” of mammals". Berkeley: University of California Museum of Paleontology. http://www.ucmp.berkeley.edu/mammal/multis/multis.html. Retrieved January 2010.
- Benton, Michael J. 2004. Vertebrate palaeontology. p. 300
- Carrano, Matthew T. et al 2006. Amniote paleobiology: perspectives on the evolution of mammals, birds, and reptiles. University of Chicago Press. p358. IBSN 0-226-09478-2
- Kielan-Jaworowska, Zofia, Richard L. Cifelli, and Zhe-Xi Luo 2005. Mammals from the Age of Dinosaurs: origins, evolution, and structure. p. 299