The Royal Society
Browse
rspb20161448_si_001.doc (7.57 MB)

Supplementary information for Gao et al. from Convergent evolution of ramified antennae in insect lineages from the Early Cretaceous of Northeastern China

Download (7.57 MB)
journal contribution
posted on 2016-09-21, 06:06 authored by Taiping Gao, Chungkun Shih, Conrad C. Labandeira, Jorge A. Santiago-Blay, Yunzhi Yao, Dong Ren
Antennae are important, insect sensory organs that are used principally for communication with other insects and 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 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 among three unrelated lineages 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.

History

Usage metrics

    Proceedings of the Royal Society B: Biological Sciences

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC