Data from: Structural mouthpart interaction evolved already in the earliest lineages of insects

Alexander Blanke, Peter T. Rühr, Rajmund Mokso, Pablo Villanueva, Fabian Wilde, Marco Stampanoni, Kentaro Uesugi, Ryuichiro Machida & Bernhard Misof
In butterflies, bees, flies and true bugs specific mouthparts are in close contact or even fused to enable piercing, sucking or sponging of particular food sources. The common phenomenon behind these mouthpart types is a complex composed of several consecutive mouthparts which structurally interact during food uptake. The single mouthparts are thus only functional in conjunction with other adjacent mouthparts, which is fundamentally different to biting–chewing. It is, however, unclear when structural mouthpart interaction (SMI)...
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