デボニアン期の魚のテトラポッドのような中耳構造.
Martin D Brazeau1, Per E Ahlberg
1Subdepartment of Evolutionary Organismal Biology, Department of Physiology and Developmental Biology, Evolutionary Biology Centre, Uppsala University, Norbyv 18A, SE-752 36 Uppsala, Sweden. martin.brazeau@ebc.uu.se
Nature
|January 20, 2006
まとめ
魚のスパイラキュラー構造からテトラポッドの中耳の進化は,Panderichthys.を研究することで解明されています. この化石は,のサスペンションの変異の初期段階を明らかにし,スパイラキュラー呼吸とのつながりを示唆しています.
科学分野:
- パレオントロジー・パレオントロジー
- 進化生物学の進化生物学について
- 比較解剖学 比較解剖学とは
背景:
- 魚からテトラポッドへの移行は,中耳の発達を含む,重要な骨格の改変を伴う.
- テトラポッドの中耳の進化の初期段階,特に状経路と骨形魚のの懸垂の変容に関する化石の証拠は稀である.
関連する概念動画
The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
Cranial Bones: Lateral View
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...


