clearly visible during early development, also: the skeleton surrounding the inner ear or otic vesicle, composed of the prootic, opisthotic, exoccipital, and supraoccipital.
也可指是围住内耳或耳小囊的骨骼，是由前耳骨、后耳骨、外枕骨
上枕骨所组
。
clearly visible during early development, also: the skeleton surrounding the inner ear or otic vesicle, composed of the prootic, opisthotic, exoccipital, and supraoccipital.
也可指是围住内耳或耳小囊的骨骼，是由前耳骨、后耳骨、外枕骨上枕骨所组。
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