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Table S1. Maximum breadth and body length dimensions of fossil insects from the Early Permian (the Elmo fauna).

Video S1. Stoneflies skimming onto shore and continuing to flap while on soft sediment.

Video S2. Flappable articulated segmental gills: a shared ancestral trait in pterygote insects.

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EVO_1743_sm_suppmat.docx120KSupporting info item
EVO_1743_sm_video_S1.dv196172KSupporting info item
EVO_1743_sm_video_S2.dv203906KSupporting info item

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