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Sci Rep:中国农业大学刘星月研究组发现琥珀中的授粉者

摘要 : 2016年5月6日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》在线发表了中国农业大学昆虫学系刘星月研究组的一篇研究论文,研究发现两个脉翅目蝶蛉类昆虫的新种,这些保存在琥珀中的昆虫来自白垩纪中期。

 

2016年5月6日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》在线发表了中国农业大学昆虫学系刘星月研究组的一篇研究论文,研究发现两个脉翅目蝶蛉类昆虫的新种,这些保存在琥珀中的昆虫来自白垩纪中期。这项研究是详细描述了保存在琥珀中的脉翅目特化延长的口器,有助于阐明白垩纪中期昆虫与植物的相互作用。

脉翅目是完全变态类昆虫中较早分化的一支,在昆虫演化中具有重要系统地位。刘星月和他的研究团队描述了发现于缅甸白垩纪中期(大约九千九百万年前)的琥珀中保存的三个蝶蛉类物种。根据与现代脉翅目昆虫和部分化石传粉昆虫的形态及生活史,研究认为这些拥有特化的吸收式口器的昆虫,很有可能以花蜜或者花粉为食,它们的长口器可能起到了临时虹吸管的作用。研究者的测量结果显示这些昆虫的口器长度在0.4毫米到1.0毫米之间,在目前已知的化石传粉昆虫中最为短小。这些昆虫的授粉对象很可能是一些已经灭绝的裸子植物,然而也不能排除包括已存在于缅甸白垩纪中期的早期被子植物。

研究者认为,缅甸琥珀中的长口器蝶蛉类昆虫对于理解白垩纪脉翅目的演化及早期的虫媒授粉模式具有重要意义。

原文链接:

New long-proboscid lacewings of the mid-Cretaceous provide insights into ancient plant-pollinator interactions

原文摘要:

Many insects with long-proboscid mouthparts are among the pollinators of seed plants. Several cases of the long-proboscid pollination mode are known between fossil insects (e.g., true flies, scorpionflies, and lacewings) and various extinct gymnosperm lineages, beginning in the Early Permian and increasing during the Middle Jurassic to Early Cretaceous. However, details on the morphology of lacewing proboscides and the relevant pollination habit are largely lacking. Here we report on three lacewing species that belong to two new genera and a described genus from mid-Cretaceous (Albian-Cenomanian) amber of Myanmar. All these species possess relatively long proboscides, which are considered to be modified from maxillary and labial elements, probably functioning as a temporary siphon for feeding on nectar. Remarkably, these proboscides range from 0.4–1.0 mm in length and are attributed to the most diminutive ones among the contemporary long-proboscid insect pollinators. Further, they clearly differ from other long-proboscid lacewings which have a much longer siphon. The phylogenetic analysis indicates that these Burmese long-proboscid lacewings belong to the superfamily Psychopsoidea but cannot be placed into any known family. The present findings represent the first description of the mouthparts of long-proboscid lacewings preserved in amber and highlight the evolutionary diversification of the ancient plant-pollinator interactions.

来源: Scientific Reports 浏览次数:0

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