The tiny auditory ossicles of the middle ear and associated areas were also well preserved in this " Castorocauda " fossil.
2.
The auditory ossicles can also reduce sound pressure ( the inner ear is very sensitive to overstimulation ), by uncoupling each other through particular muscles.
3.
In reptiles, birds, and early fossil tetrapods, there is a single auditory ossicle, the columella ( that is homologous with the stapes, or " stirrup " of mammals ).
4.
Loci have been found to be conserved only among mammalian genomes and are thought to have essential roles in the generation of features such as the placenta, diaphragm, mammary glands, neocortex, and auditory ossicles.
मोबाइल