新的研究声称牙齿最初演变为古鱼的皮肤感应器,不是咀嚼。 New study claims teeth first evolved as skin sensors in ancient fish, not for chewing.

一项新的研究表明,牙齿最初演变为早期鱼类皮肤上的感官器官,而不是咀嚼。 A new study suggests that teeth initially evolved as sensory organs on the skin of early fish rather than for chewing. 这些牙类结构可能是探测环境变化的敏感结核。 These tooth-like structures were likely sensitive nodules that detected environmental changes. 研究考察了化石,发现这些早期结构与节肢动物的感官器官比真正的牙齿更相似,而真正的牙齿是脊椎动物特有的。 The research examines fossils and finds that these early structures are more similar to sensory organs in arthropods than to true teeth, which are unique to vertebrates. 这一发现支持了一种理论,即牙齿首先出现在嘴外,然后才进入嘴内。 This discovery supports the theory that teeth first appeared outside the mouth before moving inside.