California Department of Fish and Wildlife
Aquatic Biological Assement

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Corduliidae Level 1 Level 2

Corduliidae

 

Key Characters

Median Groove on ventral side of prementum. Crenulations on palpal lobes with deep notches. Cerci half as long as paraprocts. Lateral spines of abdominal segment 9 usually longer than middorsal length, middorsal hook generally sicklelike.
Tolerance generally 2-4, can be as high as 9 in some genera (Somatochlora)
Distribution CA, OR, WA, NV