Table 1.

Dimensions of rhabdoms and focal lengths in the dorsal rim area of two dung beetle species

Speciesd (μm)l (μm)f (μm)
Scarabaeus zambesianus 11 120 555 
Pachysoma striatum 4 78 328 
Speciesd (μm)l (μm)f (μm)
Scarabaeus zambesianus 11 120 555 
Pachysoma striatum 4 78 328 

d, rhabdom diameter; l, rhabdom length; f, focal length.

Measurements were taken from electron microscopical sections (d)and light microscopical sections (l,f). d is calculated from the area of the non-circular rhabdoms.

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