| | Insects of Britain and Ireland: 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.
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, 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. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: dragonflies and damselflies (Odonata). Version: 14th April 2022. delta-intkey.com’.