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中生代哺乳动物有着深色皮毛

2025-03-14 13:32 by 开普勒62号5:病毒

根据对中生代哺乳动物毛皮颜色的定量重建,在 1.5 亿年前与恐龙共存的早期哺乳动物很可能披覆着深色及暗灰褐色的皮毛,暗示它们具有在夜间隐秘活动的特性。这些发现源自对黑素体化石的比较分析;它们为早期哺乳动物的生态和演化史提供了线索。动物的皮毛颜色在诸多行为生态(从交流到伪装)中都有重要功能。然而由于已灭绝哺乳动物色泽数据的匮乏,人们对哺乳动物皮毛色彩的演化史仍知之甚少。研究人员发现,这些早期哺乳动物的皮毛主要呈均一的深色,没有任何像众多现代哺乳动物所具有的斑、纹图案。这表明,尽管早期哺乳动物在系统发生和生态演化上存在分歧,但它们的黑色素色彩体系基本未变。这项发现对先前提出的假设提供了支持:早期哺乳动物主要也是夜行动物,它们为了隐秘伪装而具有深暗色的皮毛。此外,它们皮毛中高含量的黑色素可能有利于体温调节并提供具保护作用的机械强度。在白垩纪-古近纪灭绝事件之后,为进入先前由恐龙占据的生态位,哺乳动物迅速出现多样性演化,导致它们出现更为多样的黑素体结构和新的更适合于形形色色环境的皮毛色彩。

DOI 10.1126/science.ads9734

Eurekalert:中生代哺乳动物拥有均一的深色皮毛

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中生代哺乳动物有着深色皮毛

2025-03-14 13:32 by 开普勒62号5:病毒

根据对中生代哺乳动物毛皮颜色的定量重建,在 1.5 亿年前与恐龙共存的早期哺乳动物很可能披覆着深色及暗灰褐色的皮毛,暗示它们具有在夜间隐秘活动的特性。这些发现源自对黑素体化石的比较分析;它们为早期哺乳动物的生态和演化史提供了线索。动物的皮毛颜色在诸多行为生态(从交流到伪装)中都有重要功能。然而由于已灭绝哺乳动物色泽数据的匮乏,人们对哺乳动物皮毛色彩的演化史仍知之甚少。研究人员发现,这些早期哺乳动物的皮毛主要呈均一的深色,没有任何像众多现代哺乳动物所具有的斑、纹图案。这表明,尽管早期哺乳动物在系统发生和生态演化上存在分歧,但它们的黑色素色彩体系基本未变。这项发现对先前提出的假设提供了支持:早期哺乳动物主要也是夜行动物,它们为了隐秘伪装而具有深暗色的皮毛。此外,它们皮毛中高含量的黑色素可能有利于体温调节并提供具保护作用的机械强度。在白垩纪-古近纪灭绝事件之后,为进入先前由恐龙占据的生态位,哺乳动物迅速出现多样性演化,导致它们出现更为多样的黑素体结构和新的更适合于形形色色环境的皮毛色彩。

DOI 10.1126/science.ads9734

Eurekalert:中生代哺乳动物拥有均一的深色皮毛

#科学

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