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社评“日本REPRODUCTION OF FOUND”-环球时报

中美科研人员揭日本REPRODUCTION OF FOUND示角龙类恐龙进化过程新特征

来源: 海峡导报社
2024-11-08 20:46:43

最佳回答

“日本REPRODUCTION OF FOUND”中美科研人员揭日本REPRODUCTION OF FOUND示角龙类恐龙进化过程新特征

  中新日本REPRODUCTION OF FOUND社武汉11月8日电 (马日本REPRODUCTION OF FOUND芙蓉 孙彦钦 余淳梅)中美科研人员通过对早期角龙类恐龙颅腔形态进行研究发现,随着体型增大,角龙类恐龙在听觉、嗅觉和聪明程度等方面出现退化。相关成果于近日发表于国际期刊《古生物学》(Paleobiology)。

  论文通讯作者、中国地质大学(武汉)地球科学学院副教授韩凤禄8日接受记者采访时表示,这项研究对于认识生物演化包括人类的演化具有启示作用。

  角龙类恐龙是一类生活在侏罗纪和白垩纪的植食性恐龙。早期角龙类恐龙两足行走,只有1米至2米,还没有长角,如隐龙和鹦鹉嘴龙。但是至白垩纪晚期,经过近亿年演化,角龙类恐龙已成为四足行走、体长可达9米,能和霸王龙争锋的有角恐龙,如三角龙。

  与巨大体型相伴随的身体特征的变化,一直是古生物学者希望解开的谜团。

  对此,韩凤禄团队联合中国科学院古脊椎动物与古人类研究所、云南大学、南京古生物博物馆及美国乔治华盛顿大学研究人员,利用微计算机断层扫描技术和三维模型重建方法,分日本REPRODUCTION OF FOUND析了发现于中国的三种早期角龙类恐龙的颅腔结构。

  结果发现,早期角龙类恐龙嗅觉、听觉、聪明程度均优于晚期角龙类恐龙,表明其在进化过程中出现退化现象。研究人员还探讨了角龙类演化过程中头部姿势的转变,发现早期角龙类头部更加灵活,而晚期角龙,如三角龙头主要向下倾斜,这种姿势转化或与其取食方式有关。

  “角龙类恐龙演化过程中出现器官退化,可能与其体型增大相关。”韩凤禄认为,早期角龙类体型较小,需要时刻警惕捕食者的攻击,因此在听觉、嗅觉等方面表现优异。(完)

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