Movie S3. Surface renderings of heads and mandibles of the three specimens used for FEA. from Snap-jaw morphology is specialized for high-speed power amplification in the Dracula ant, Mystrium camillae

Mandibles (top) were defeatured and smoothed for finite element analysis. Heads (bottom) were used to visualize mandible muscle morphology and to determine points of attachment for muscle. Mandible adductor muscle (yellow), mandible abductor (blue), and mandible (brown) are displayed. Models are not to scale.