進化からみたotic capsuleの発育についての考察
1989 年 20 巻 1 号 p. 87-88
詳細
1989 年 20 巻 1 号 p. 87-88
It is our subject why otic capsule is cartilage bone. Recently, we are considerate that it is difficult to solve the problems in biological and biophysical methods and discussions have been evolutionally attempted.
The results have an intetesting bearing on nature of ossicles. Stapes is derived from hyomandibula in teleosts, malleus from articular and incus from quadrate. Skull of codfish shown in figure consists of dermal bone and cartilage bone.
It is suspected that these cartilage bone of teleosts is derived from palatoquadrate and hyomanddibula and dermal bone replaces with brain case in shark.
