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Flag Counter
  2. World Encyclopedia
  3. Postdentary trough - Wikipedia
Postdentary trough - Wikipedia
From Wikipedia, the free encyclopedia

The postdentary trough is a skeletal feature seen in Mesozoic mammals. It is found on the inside of the lower jaw (dentary), at the back behind the molar teeth. It is the hollow in which the postdentary bones and Meckel's cartilage sit. These bones form the middle ear in later mammal groups (see Evolution of mammalian auditory ossicles); they include the incus (quadrate), malleus (articular), ectotympanic (angular) and prearticular.[1]

In Mesozoic mammals these bones gradually change position and size until they are incorporated in the middle ear.[1]

References

  1. ^ a b Zhe-Xi Luo 2011 Developmental patterns in Mesozoic evolution of mammal ears. Annual Review of Ecology, Evolution, and Systematics, 42, 355-380


Stub icon

This vertebrate anatomy–related article is a stub. You can help Wikipedia by adding missing information.

Sunting pranala
url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url url 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