British Insects: Dragonflies and Damselflies (Odonata)
Unless indicated otherwise, the following attributes are implicit throughout the descriptions, except where the characters concerned are inapplicable.
Adults. The front of the head immediately interior to the eyes not pale whitish blue. The three ocelli arranged in a triangle.
Thorax not very hairy. Hind tibia without a featherlike expansion. Pterostigma present.
Abdomen non-metallic; without a yellow triangle on segment 2. The female without a long ovipositor.
Nymphs. The eyes lateral and widely separated on the top of the head. The moveable hooks of the labial palps without setae.
The abdomen without mid-dorsal spines. The ventral surface of the abdomen without distictive markings.
To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: Dragonglies and Damselflies (Odonata). Version: 1st January 2012. http://delta-intkey.com’.