| 1a. Subgenital plate basally incised, appears to be a tab or capable of flapping. |
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| 1b. Subgenital plate not incised, attached to segment through its entire length. May have a variety of shapes at the end of the segment, but no sign of flapping. |
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| 2a. Subgenital plate laterally emarginate. |
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| 2b. Subgenital plate not laterally emarginate. |
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