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Mesopsocus unipunctatus

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Species account
No photo of live animal A moderately large (females – c.3.5-5.5mm; males – c.5.5-6.5mm) barkfly. The females have tiny wings (micropterous), the males have long wings (macropterous). Uncommon in Britain and Ireland.
Mesopsocus unipunctatus The forewings of all Mesopsocus species are glabrous (i.e. completely hairless). Four vein portions meet, or almost meet, at a point where veins Rs and M join.
Mesopsocus unipunctatus Female
The relative large size of females of M. unipunctatus (and M. immunis) makes them conspicuous in the field. The tiny wing ‘stumps’ can be seen in the photo. The patterning of the body can be very variable but compared to M. immunis there is often a more brownish tinge.
Mesopsocus unipunctatus Mesopsocus unipunctatus Female
The apex of the subgenital plate is rounded (cf. M. immunis).
Mesopsocus unipunctatus Mesopsocus unipunctatus Male
The end lobe of the phallosome is relatively short (cf. M. laticeps) and the side lobe is prominent (cf. M. immunis).

 

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