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Cacopsylla melanoneura
Family: Psyllidae

Cacopsylla is the most complex of all UK psyllid genera, and many species require dissection to separate them.

C. melanoneura is a difficult species to confirm photographically, requiring examination of the male genitalia to separate from C. affinis. To separate from other species, the female terminalia are unusually (but not uniquely) long, and the colouring of mature specimens is relatively consistent (although shared by other species). Genal cones are obliquely truncated at the apex. Abdomen may be green in younger specimens. Males should be confirmed by dissection.

Very common on Hawthorn across the UK; among the most widespread of UK species. Overwinters on evergreens.

Adult: All year
Length 3.5-4 mm
Cacopsylla melanoneura
Adult male: Huddersfield (January 2009) ©Joe Botting
Cacopsylla melanoneura Cacopsylla melanoneura
5th instar nymph: Huddersfield (April 2009) ©Joe Botting Adult female: Huddersfield (June 2009) ©Joe Botting