British Insects: the Genera of Ephemeroptera
Imago. The compound eyes distinctly two-lobed (in males), or rounded (in females); upper lobe in the males rounded.
Wings fringed only in sub-imagines. Fore-wings with veins M1 and Cu1 sub-parallel basally; with R5 and R4 joined basally. Hind-wings present. The hind-wing costa smoothly curved. Hind tarsi with 4 moveable segments.
The abdomen with three tails. The lobes of the penis each with two recurved appendages.
Nymph. The outer tails hairy on both sides. Gills mostly at the sides of the abdomen; not fringed with filaments on both sides; never comprising a plate bearing a tuft of filaments.
Classification. Superfamily Baetoidea. Family Leptophlebiidae.
British representation. 3 species; P. cincta (Purple Dun and Spinners), P. submarginata (Turkey Brown Dun and Spinners), and P. werneri.
To view illustrations with legends giving names in current use, 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, as well as source references and other relevant material.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the genera of Ephemeroptera. Version: 29th December 2011. http://delta-intkey.com’.