British Insects: the Genera of Ephemeroptera
Imago. The compound eyes rounded.
Wings more or less spotted with brown or blackish. Fore-wings with veins M1 and Cu1 strongly strongly diverging basally; with R5 and R4 joined basally. Hind-wings present. The hind-wing costa smoothly curved. Hind tarsi with 4 moveable segments, or with 2–3 moveable segments.
The abdomen with three tails. The lobes of the penis without recurved appendages.
Nymph. Gills all densely fringed with filaments on both sides.
Classification. Superfamily Ephemeroidea. Family Ephemeridae.
British representation. 3 species; E. danica (Mayfly or Green Drake Dun, Mayfly male Spinner, and Mayfly, Spent Gnat or Black Drake female Spinner), E. lineata, and E. vulgata (Drake Mackerel Dun and Spinners).
Illustrations. • Ephemera vulgata: B. Ent. 708. • Ephemera vulgata: B. Ent. 708, legend+text. • Ephemera vulgata: B. Ent. 708, legend cont.. • Ephemera vulgata.
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’.