| 0: Without elevated flanges |
| notes: |
| coded examples: Pergaphaga iangauldi Cammack and Wharton, 2010, Pergaphaga leaski Wharton, 2010 |
| 1: With strongly elevated flanges |
| notes: |
| coded examples: Pergaphaga nigra Gauld, 1984, Pergaphaga xanthops Wharton, 2010 |
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