Convergent evolution of ramified antennae in insect lineages from the Early Cretaceous of Northeastern China
Convergent evolution of ramified antennae in insect lineages from the Early Cretaceous of Northeastern China
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中国东北早白垩世昆虫谱系分枝触角的趋同演化
DOI：
10.1098/rspb.2016.1448
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发表时间：
2016-09-28
影响因子：
4.7
通讯作者：
Ren, Dong
中科院分区：
文献类型：
--
作者：
Gao, Taiping;Shih, Chungkun;Ren, Dong
触角是重要的昆虫感官器官，主要用于与其他昆虫交流和检测环境线索。一些昆虫独立进化出分支(分支)触角，这些触角包含几种类型的感受器，用于运动检测、感知嗅觉和化学线索，以及确定湿度和温度水平。虽然分支触角在活着的昆虫中很常见，但在中生代化石记录中偶尔也会出现。在这里，我们提出了第一批具有分支触角的尸类，已知最早的锯蝇化石，以及一种也具有分支触角的蝎子，来自中国东北部的中下白垩世义县组，年代为1.25亿年前(Ma)。这三个具有分支触角的昆虫分类群由三个不相关的谱系组成，为广泛的结构趋同提供了证据，历史上最好地证明了这一点，例如会聚的口器。此外，这些中生代谱系中的分支触角可能不构成一项关键的创新，因为与缺乏这一特征的密切相关谱系相比，它们与显著增加的多样性无关，也不是从许多具有未经修改的触角的共生昆虫物种中分离出来的。
Antennae are important, insect sensory organs that are used principally for communication with other insects and the detection of environmental cues. Some insects independently evolved ramified (branched) antennae, which house several types of sensilla for motion detection, sensing olfactory and chemical cues, and determining humidity and temperature levels. Though ramified antennae are common in living insects, occasionally they are present in the Mesozoic fossil record. Here, we present the first caddisflies with ramified antennae, the earliest known fossil sawfly, and a scorpionfly also with ramified antennae from the mid-Lower Cretaceous Yixian Formation of Northeastern China, dated at 125 million years ago (Ma). These three insect taxa with ramified antennae consist of three unrelated lineages and provide evidence for broad structural convergence that historically has been best demonstrated by features such as convergent mouthparts. In addition, ramified antennae in these Mid-Mesozoic lineages likely do not constitute a key innovation, as they are not associated with significantly increased diversification compared with closely related lineages lacking this trait, and nor are they ecologically isolated from numerous, co-occurring insect species with unmodified antennae.