British Insects: the Genera of Ephemeroptera
Imago. The compound eyes rounded.
Second antennal segment three times as long as the first. Wings fringed in the imago. Fore-wings with R5 and R4 joined basally. Hind-wings absent. The fore-legs widely separated under the thorax. Hind tarsi with 4 moveable segments.
The abdomen with three tails.
Nymph. Gills mostly lying on the upper surface of the abdomen; not fringed with filaments on both sides.
Classification. Superfamily Baetoidea. Family Caenidae.
British representation. 1 species (B. harrisella).
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’.