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- Antennomeres 3-11 extremely elongate, with prominent long black setae much longer than the width of their corresponding segment
- Body distinctly widest at elytra
- Antennomeres 1 and 2 much wider than
3-11
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- Antennomeres 5-11 with antennal setae almost always shorter than the width of their corresponding segment
- If with antennae similar to 1.21.2 (one genus), then body linear in form, with all body sections subequal in width
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