Coryphodontidae

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Coryphodontidae
Temporal range: Late Paleocene–Middle Eocene
Cambridge Natural History Mammalia Fig 115.jpg
Coryphodon skeleton
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Cimolesta
Suborder: Pantodonta
Cope 1873
Superfamily: Coryphodontoidae
Simons 1960
Family: Coryphodontidae
Marsh 1876
Genera[1]
Synonyms
  • Bathmodontidae

Coryphodontidae is an extinct family of pantodont mammals known from the Late Paleocene to the Middle Eocene of Eurasia and North America.[2]

The Late Eocene dinoceratan Gobiatherium major, and the pantodont Hypercoryphodon, of what is now Mongolia.

The type genus Coryphodon is known from around the Paleocene-Eocene transition in Europe, western United States, northern Canada, and eastern Asia. The remaining genera are known exclusively from the middle Eocene of Asia.[3]

The coryphodontids are related to the pantolambdids. Coryphodon are large, derived pantodonts first described in the mid-19th century, but no intermediate stages leading to their unusual upper molars are known.[4] The last known species of Coryphodon have bilophodont molars similar to later, more derived coryphodontids, and, most likely, Coryphodon is the primitive sister taxon to the remaining genera and the entire lineage (or lineages) originated from within this genus.[5] Two coryphodontids considerably larger than Coryphodon but endemic to China, Asiocoryphodon and Heterocoryphodon, have more advanced bilophodont dentition.[6] Metacoryphodon is morphologically transitional between Coryphodon and Eudinoceras.[7]

Corypohodontids were slow-growing and long-living animals, and studies of a large sample of individuals from a single locality, assumed to be from the same population, suggest that coryphodontids had a polygynous social structure in which males and females reached sexual maturity at different ages.[8][2]

Notes[edit]

  1. ^ Coryphodontidae in the Paleobiology Database. Retrieved July 2013.
  2. ^ a b "New Material of Mammal Coryphodontid Found From the Erlian Basin Of Nei Mongol". Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences. August 2012. Retrieved July 2013. 
  3. ^ Lucas & Tong 1988, Introduction
  4. ^ Rose 2006, p. 118
  5. ^ Uhen & Gingerich 1995, p. 265
  6. ^ Lucas 2001, p. 213
  7. ^ Chow & Qi 1982, p. 312
  8. ^ Mao & Wang 2012, p. 276

References[edit]