Sinoconodon
| Sinoconodon | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida
|
| Clade: | Cynodontia
|
| Clade: | Mammaliamorpha |
| Order: | †Sinoconodontiformes Kinman, 1994 |
| Family: | †Sinoconodontidae Mills, 1971 |
| Genus: | †Sinoconodon Patterson & Olson, 1961 |
| Species: | †S. rigneyi
|
| Binomial name | |
| †Sinoconodon rigneyi | |
| Synonyms | |
|
List
| |
Sinoconodon is an extinct genus of
dentary and the squamosal bones, which in more derived taxa would replace the primitive tetrapod one between the articular and quadrate bones. The presence of a dentary-squamosal joint is a trait historically used to define mammals.[2][3]
Description
This animal had skull of 6 cm (2.4 in) which suggest a presacral body length of 25 cm (9.8 in) and weight about 800 g (28 oz) due to the similar parameters to the
docodonts.[2][6] The combination of basal tetrapod and mammalian features makes it a unique transitional fossil.[7]
Taxonomy
Sinoconodon was named by Patterson and Olson in 1961. Its type is Sinoconodon rigneyi. It was assigned to Triconodontidae by Patterson and Olson in 1961; to Triconodonta by Jenkins and Crompton in 1979; to Sinoconodontidae by Carroll in 1988; to Mammaliamorpha by Wible in 1991; to Mammalia by Luo and Wu in 1994; to Mammalia by Kielan-Jaworowska et al. in 2004; and to Mammaliaformes by Luo et al. in 2001 and Bi et al. in 2014.[8]
Phylogeny
| Mammaliaformes |
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References
- ISBN 978-0231084833.
- ^ ISBN 9780231119184.
- ISBN 9780123693969.
- ISBN 9780198507611. Retrieved 22 September 2022.
- ^ Luo, ZX; Kielan-Jaworowska, Z; Cifelli, RL (2002). "In quest for a phylogeny of Mesozoic mammals". Acta Palaeontologica Polonica. 47 (1): 1–78.
- PMID 26190074.
- ^ Mammals of the Mesozoic: The least mammal-like mammals
- ^ "PBDB". paleobiodb.org. Retrieved 2018-05-21.