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Pyrgus upperside photographs (all 13) Pyrgus underside photographs (all 13) Pyrgus uppersides chart
Pyrgus undersides chart ("the 7") Pyrgus undersides chart ("other 7") Pyrgus observations

 

The images below are considered to be broadly typical of the species. In several species, the less frequently see females are rather more lightly marked; some of these are shown below for comparison purposes.

Pyrgus alveus Pyrgus andromedae
Pyrgus armoricanus Pyrgus bellieri
Pyrgus cacaliae Pyrgus carlinae
Pyrgus carthami Pyrgus cirsii
Pyrgus malvae/malvoides Pyrgus onopordi
Pyrgus serratulae Pyrgus sidae
Pyrgus warrenensis Pyrgus alveus ssp accretus

 

These are the females of four species where the female is (slightly) more lightly marked than the male. This is also true for P. bellieri but I do not have a suitable photo of the female at this moment.
Pyrgus armoricanus Pyrgus cacaliae
Pyrgus carlinae Pyrgus carthami
Pyrgus cirsii Pyrgus malvae/malvoides
Pyrgus onopordi Pyrgus serratulae
 
Pyrgus sidae