Note: Key from Theischinger & Endersby 2009 |
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1. Lateral spines (LS) on abdominal segment 9 extremely long, about 6X mid-dorsal length (L) of segment 9 More ››› Pentathemis ![]()
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-Lateral spines on abdominal segment 9 not extremely long, not more than 3X mid-dorsal length of segment 9
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