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解惑“黑人30厘米全部进去了乌木”-梳理天下新闻

中外科学家探秘黑人30厘米全部进去了乌木远古昆虫的“飞行竞赛”

来源: 蓉城政事
2024-11-01 08:49:02

最佳回答

“黑人30厘米全部进去了乌木”中外科学家探秘黑人30厘米全部进去了乌木远古昆虫的“飞行竞赛”

  中新黑人30厘米全部进去了乌木网南京10月30日电(记者黑人30厘米全部进去了乌木 徐珊珊)记者30日从中国科学院南京地质古生物研究所获悉,该所科研人员领衔的国际古生物团队以古蝉为对象开展研究,揭示了鸟类早期辐射事件对昆虫演化的影响,为中生代的“飞行竞赛”假说提供了有力证据。

  相关研究成果于近日在线发表于《科学进展》(Science Advances)上。

  古蝉和现生蝉类的亲缘关系较近,具有相似的形态特征和飞行机制。它们在中生代非常繁盛,保存了大量的化石记录,因此是探究昆虫飞行能力演化的理想类群。

  研究黑人30厘米全部进去了乌木团队建立了古蝉的综合形态特征数据库,系统重建了古蝉的宏演化历史。研究团队发现,在侏罗纪晚期,古蝉类群经历了一次显著的演替事件。早期古蝉具有近似椭圆形的前翅、较大的后翅和较小的中胸,而晚期古蝉则演化出近似三角形的前翅、较小的后翅和较大的中胸。

  中国科学院南京地质古生物研究所博士许春鹏表示,相比早期古蝉,晚期古蝉的翅载荷提高了92%,飞行速度提升了39%,飞行肌肉占比提高了19%,飞行灵活度和效率均有显著提高。

  此次研究发现,侏罗纪、白垩纪之交的古蝉类群演替事件在时间上与早期鸟类的大辐射相吻合。因此,早期鸟类的繁盛很可能促进了古蝉的类群演替,导致了早期古蝉的衰落,以及晚期古蝉的崛起。该研究成果为定量计算灭绝昆虫的飞行能力提供了新思路、新方法。(完)

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