There is still a great deal of taxonomic confusion surrounding many of these species and they are often categorized into a bewildering array of groups, complexes and superspecies (Text from Harper et al., 2010).
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith